diff --git a/SRB2.cbp b/SRB2.cbp
index 628e7da30a48f8e93ce047e767850fe05bad2b0c..4834563ec842f1d4386a0a0f745f080bef189381 100644
--- a/SRB2.cbp
+++ b/SRB2.cbp
@@ -33,7 +33,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="-g" />
 					<Add option="`sdl-config --cflags`" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DPARANOIA" />
 					<Add option="-DRANGECHECK" />
 					<Add option="-D_DEBUG" />
@@ -56,7 +56,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="-g" />
 					<Add option="`sdl-config --cflags`" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DNDEBUG" />
 					<Add option="-DCOMPVERSION" />
 					<Add option="-DHAVE_BLUA" />
@@ -77,7 +77,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="`sdl-config --cflags`" />
 					<Add option="`libpng-config --cflags`" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DHAVE_MIXER" />
 					<Add option="-DHWRENDER" />
 					<Add option="-DHW3SOUND" />
@@ -107,7 +107,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="`sdl-config --cflags`" />
 					<Add option="`libpng-config --cflags`" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DHAVE_MIXER" />
 					<Add option="-DHWRENDER" />
 					<Add option="-DHW3SOUND" />
@@ -138,7 +138,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="-D__USE_MINGW_ANSI_STDIO=0" />
 					<Add option="-DUSE_WGL_SWAP" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DHAVE_MIXER" />
 					<Add option="-DHWRENDER" />
 					<Add option="-DHW3SOUND" />
@@ -185,7 +185,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="-D__USE_MINGW_ANSI_STDIO=0" />
 					<Add option="-DUSE_WGL_SWAP" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DHAVE_MIXER" />
 					<Add option="-DHAVE_FMOD" />
 					<Add option="-DHWRENDER" />
@@ -551,7 +551,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="-DSTDC_HEADERS" />
 					<Add option="-DUSE_WGL_SWAP" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DHAVE_MIXER" />
 					<Add option="-DHWRENDER" />
 					<Add option="-DHW3SOUND" />
@@ -592,7 +592,7 @@ HW3SOUND for 3D hardware sound  support
 					<Add option="-DSTDC_HEADERS" />
 					<Add option="-DUSE_WGL_SWAP" />
 					<Add option="-DDIRECTFULLSCREEN" />
-					<Add option="-DSDL" />
+					<Add option="-DHAVE_SDL" />
 					<Add option="-DHAVE_MIXER" />
 					<Add option="-DHWRENDER" />
 					<Add option="-DHW3SOUND" />
diff --git a/Srb2.dev b/Srb2.dev
index 00b7811e1d53f952ec2620c542bd4f83fa160a53..21683e7c3c5e055393d91778fba3405bfae240de 100644
--- a/Srb2.dev
+++ b/Srb2.dev
@@ -2228,7 +2228,7 @@ Includes=libs/libpng-src;libs/zlib;libs
 Libs=libs/libpng-src/projects;libs/zlib/win32;libs/miniupnpc/mingw32
 ResourceIncludes=src/win32
 MakeIncludes=comptime.mk;cpdebug.mk
-Compiler=-DNDEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-Os_@@_-g_@@_-gdwarf-2_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DSDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
+Compiler=-DNDEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-Os_@@_-g_@@_-gdwarf-2_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DHAVE_SDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
 CppCompiler=-Os_@@_-g_@@_-gdwarf-2_@@_
 Linker=-lSDL_@@_-lSDL_Mixer_@@_-lpng32_@@_-lz32_@@_-lminiupnpc_@@_-lws2_32_@@_-liphlpapi_@@_-mconsole_@@_
 PreprocDefines=NORMALSRB2_@@_
@@ -2305,7 +2305,7 @@ Includes=libs/libpng-src;libs/zlib;libs
 Libs=libs/libpng-src/projects;libs/zlib/win32;libs/miniupnpc/mingw32
 ResourceIncludes=src/win32
 MakeIncludes=comptime.mk;cpdebug.mk
-Compiler=-D_DEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-O0_@@_-g_@@_-gdwarf-2_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DSDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
+Compiler=-D_DEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-O0_@@_-g_@@_-gdwarf-2_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DHAVE_SDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
 CppCompiler=-O0_@@_-g_@@_-gdwarf-2_@@_
 Linker=-lSDL_@@_-lSDL_Mixer_@@_-lpng32_@@_-lz32_@@_-lminiupnpc_@@_-lws2_32_@@_-liphlpapi_@@_-mconsole_@@_
 PreprocDefines=NORMALSRB2_@@_
@@ -2386,7 +2386,7 @@ Includes=libs/libpng-src;libs/zlib;libs
 Libs=libs/libpng-src/projects;libs/zlib/win32;libs/miniupnpc/mingw64
 ResourceIncludes=src/win32
 MakeIncludes=comptime.mk;cpdebug.mk
-Compiler=-DNDEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-Os_@@_-g_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DSDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
+Compiler=-DNDEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-Os_@@_-g_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DHAVE_SDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
 CppCompiler=-Os_@@_-g_@@_
 Linker=-lSDL_@@_-lSDL_Mixer_@@_-lpng64_@@_-lz64_@@_-lminiupnpc_@@_-lws2_32_@@_-liphlpapi_@@_-mconsole_@@_
 PreprocDefines=NORMALSRB2_@@_
@@ -2413,7 +2413,7 @@ Includes=libs/libpng-src;libs/zlib;libs
 Libs=libs/libpng-src/projects;libs/zlib/win32;libs/miniupnpc/mingw64
 ResourceIncludes=src/win32
 MakeIncludes=comptime.mk;cpdebug.mk
-Compiler=-D_DEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-O0_@@_-g_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DSDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
+Compiler=-D_DEBUG_@@_-fno-exceptions_@@_-DSTDC_HEADERS_@@_-Wall_@@_-O0_@@_-g_@@_-DUSE_WGL_SWAP_@@_-DDIRECTFULLSCREEN_@@_-DHAVE_SDL_@@_-DHWRENDER_@@_-DHW3SOUND_@@_-DHAVE_MIXER_@@_-DHAVE_PNG_@@_-D__USE_MINGW_ANSI_STDIO=0_@@_-DHAVE_MINIUPNPC_@@_-DSTATIC_MINIUPNPC_@@_-DHAVE_BLUA_@@_
 CppCompiler=-O0_@@_-g_@@_
 Linker=-lSDL_@@_-lSDL_Mixer_@@_-lpng64_@@_-lz64_@@_-lminiupnpc_@@_-lws2_32_@@_-liphlpapi_@@_-mconsole_@@_
 PreprocDefines=NORMALSRB2_@@_
diff --git a/src/Makefile b/src/Makefile
index 2e3f5406e48db89e918938955aab232d347cfbb4..983f62a7330be7b329d534f37fbaf48004a24601 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -10,7 +10,7 @@
 #     -DPC_DOS    -> use DOS specific code (eg:textmode stuff)...
 #     -DLINUX     -> use for the GNU/Linux specific
 #     -D_WINDOWS  -> use for the Win32/DirectX specific
-#     -DSDL       -> use for the SDL interface
+#     -DHAVE_SDL  -> use for the SDL interface
 #
 # Sets:
 #     Compile the DGJPP/DOS version with 'make WATTCP=1'
diff --git a/src/console.c b/src/console.c
index f8d31a6988cea95fee18d4123e82b55bab346ad7..5f8dd2bb2b4f0a2f551f43838f4e2728aeede42e 100644
--- a/src/console.c
+++ b/src/console.c
@@ -1139,7 +1139,7 @@ void CONS_Printf(const char *fmt, ...)
 	// if not in display loop, force screen update
 	if (con_startup)
 	{
-#if (defined (_WINDOWS)) || (defined (__OS2__) && !defined (SDL))
+#if (defined (_WINDOWS)) || (defined (__OS2__) && !defined (HAVE_SDL))
 		static lumpnum_t con_backpic_lumpnum = UINT32_MAX;
 		patch_t *con_backpic;
 
diff --git a/src/d_main.c b/src/d_main.c
index 2f3dd8b619da9e0bb78533029e6557169171255d..b0d248ef23e41e4bd73984cad0e391868c2012a6 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -731,7 +731,7 @@ static void IdentifyVersion(void)
 	char *srb2wad1, *srb2wad2;
 	const char *srb2waddir = NULL;
 
-#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (SDL)
+#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	// change to the directory where 'srb2.srb' is found
 	srb2waddir = I_LocateWad();
 #endif
@@ -757,7 +757,7 @@ static void IdentifyVersion(void)
 		}
 	}
 
-#if defined (macintosh) && !defined (SDL)
+#if defined (macintosh) && !defined (HAVE_SDL)
 	// cwd is always "/" when app is dbl-clicked
 	if (!stricmp(srb2waddir, "/"))
 		srb2waddir = I_GetWadDir();
@@ -804,7 +804,7 @@ static void IdentifyVersion(void)
 	// Add our crappy patches to fix our bugs
 	D_AddFile(va(pandf,srb2waddir,"patch.dta"));
 
-#if !defined (SDL) || defined (HAVE_MIXER)
+#if !defined (HAVE_SDL) || defined (HAVE_MIXER)
 	{
 #if defined (DC) && 0
 		const char *musicfile = "music_dc.dta";
@@ -929,7 +929,7 @@ void D_SRB2Main(void)
 	D_Titlebar(srb2, title);
 #endif
 
-#if defined (__OS2__) && !defined (SDL)
+#if defined (__OS2__) && !defined (HAVE_SDL)
 	// set PM window title
 	snprintf(pmData->title, sizeof (pmData->title),
 		"Sonic Robo Blast 2" VERSIONSTRING ": %s",
@@ -1136,7 +1136,7 @@ void D_SRB2Main(void)
 
 	G_LoadGameData();
 
-#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (SDL)
+#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	VID_PrepareModeList(); // Regenerate Modelist according to cv_fullscreen
 #endif
 
diff --git a/src/d_netcmd.c b/src/d_netcmd.c
index 1a1777a4d3e0e352d42b8aa24ef7e990b2970bbf..62531598addcfc3a0615fbf4d8cdfe400e13fba9 100644
--- a/src/d_netcmd.c
+++ b/src/d_netcmd.c
@@ -258,7 +258,7 @@ consvar_t cv_usejoystick = {"use_joystick", "0", CV_SAVE|CV_CALL, usejoystick_co
 consvar_t cv_usejoystick2 = {"use_joystick2", "0", CV_SAVE|CV_CALL, usejoystick_cons_t,
 	I_InitJoystick2, 0, NULL, NULL, 0, 0, NULL};
 #endif
-#if (defined (LJOYSTICK) || defined (SDL))
+#if (defined (LJOYSTICK) || defined (HAVE_SDL))
 #ifdef LJOYSTICK
 consvar_t cv_joyport = {"joyport", "/dev/js0", CV_SAVE, joyport_cons_t, NULL, 0, NULL, NULL, 0, 0, NULL};
 consvar_t cv_joyport2 = {"joyport2", "/dev/js0", CV_SAVE, joyport_cons_t, NULL, 0, NULL, NULL, 0, 0, NULL}; //Alam: for later
diff --git a/src/doomdef.h b/src/doomdef.h
index 3ce330af19f00245638ec5062e7d735d3501793e..df61c49996a0071f0b4cbe40f13a9a507f50db1d 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -24,7 +24,7 @@
 #define SOUND_FMOD    3
 
 #ifndef SOUND
-#ifdef SDL
+#ifdef HAVE_SDL
 
 // Use Mixer interface?
 #ifdef HAVE_MIXER
diff --git a/src/hardware/hw3dsdrv.h b/src/hardware/hw3dsdrv.h
index 4938f87638e3cdf621da44b356cf244bd21ec640..8811d4546df376aa72a2524ad184a66e16db706c 100644
--- a/src/hardware/hw3dsdrv.h
+++ b/src/hardware/hw3dsdrv.h
@@ -24,7 +24,7 @@
 #include "hw_dll.h"
 #include "hws_data.h"
 
-#if defined (SDL) || !defined (HWD)
+#if defined (HAVE_SDL) || !defined (HWD)
 EXPORT void HWRAPI(Shutdown) (void);
 #endif
 
diff --git a/src/hardware/hw_data.h b/src/hardware/hw_data.h
index 77db10805a9f3ef971a3f5eeff093fe2226d02f2..a6525a2f5ce029e430e3ff9adba2211594191dc1 100644
--- a/src/hardware/hw_data.h
+++ b/src/hardware/hw_data.h
@@ -26,7 +26,7 @@
 #include <windows.h>
 #endif
 
-#if defined (VID_X11) && !defined (SDL)
+#if defined (VID_X11) && !defined (HAVE_SDL)
 #include <GL/glx.h>
 #endif
 
diff --git a/src/hardware/hw_drv.h b/src/hardware/hw_drv.h
index 854e7aaaf15373ade9df7b85d0d2b395e8ee6fff..76fce5e475172bdf3fe39577ff83f696434f5aee 100644
--- a/src/hardware/hw_drv.h
+++ b/src/hardware/hw_drv.h
@@ -32,12 +32,12 @@
 //                                                       STANDARD DLL EXPORTS
 // ==========================================================================
 
-#ifdef SDL
+#ifdef HAVE_SDL
 #undef VID_X11
 #endif
 
 EXPORT boolean HWRAPI(Init) (I_Error_t ErrorFunction);
-#ifndef SDL
+#ifndef HAVE_SDL
 EXPORT void HWRAPI(Shutdown) (void);
 #endif
 #ifdef _WINDOWS
@@ -116,7 +116,7 @@ struct hwdriver_s
 	HookXwin            pfnHookXwin;
 	GetRenderer         pfnGetRenderer;
 #endif
-#ifndef SDL
+#ifndef HAVE_SDL
 	Shutdown            pfnShutdown;
 #endif
 #ifdef SHUFFLE
diff --git a/src/hardware/r_opengl/r_opengl.c b/src/hardware/r_opengl/r_opengl.c
index 2e57ae6e37c8c8aa67af704a842b2170702f712b..b853f084e00166dd6f91a37bef2bbdabe8498baa 100644
--- a/src/hardware/r_opengl/r_opengl.c
+++ b/src/hardware/r_opengl/r_opengl.c
@@ -163,7 +163,7 @@ static I_Error_t I_Error_GL = NULL;
 //                  : else do nothing
 // Returns          :
 // -----------------+
-#if !(defined (SDL) && defined (STATIC3DS))
+#if !(defined (HAVE_SDL) && defined (STATIC3DS))
 FUNCPRINTF void DBG_Printf(const char *lpFmt, ...)
 {
 #ifdef DEBUG_TO_FILE
diff --git a/src/hardware/r_opengl/r_opengl.h b/src/hardware/r_opengl/r_opengl.h
index 875ac6fba51ace7a8c4840dbc4b78339fd71a5f8..fd018f4b13c1b73b92761b88ed137ef6389cff7f 100644
--- a/src/hardware/r_opengl/r_opengl.h
+++ b/src/hardware/r_opengl/r_opengl.h
@@ -20,7 +20,7 @@
 #ifndef _R_OPENGL_H_
 #define _R_OPENGL_H_
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #ifdef _MSC_VER
 #pragma warning(disable : 4214 4244)
@@ -50,7 +50,7 @@
 
 #undef DEBUG_TO_FILE            // maybe defined in previous *.h
 #define DEBUG_TO_FILE           // output debugging msgs to ogllog.txt
-#if defined ( SDL ) && !defined ( LOGMESSAGES )
+#if defined ( HAVE_SDL ) && !defined ( LOGMESSAGES )
 #undef DEBUG_TO_FILE
 #endif
 
@@ -109,7 +109,7 @@ extern PFNglGetString pglGetString;
 
 extern const GLubyte    *gl_extensions;
 extern RGBA_t           myPaletteData[];
-#ifndef SDL
+#ifndef HAVE_SDL
 extern FILE             *logstream;
 #endif
 extern GLint            screen_width;
diff --git a/src/hardware/s_ds3d/s_ds3d.c b/src/hardware/s_ds3d/s_ds3d.c
index 2cbf95599c124c066ccce658f6e3f362b827fe56..5299c1795b2567ee73ba4e73677f2d634358b33e 100644
--- a/src/hardware/s_ds3d/s_ds3d.c
+++ b/src/hardware/s_ds3d/s_ds3d.c
@@ -48,7 +48,7 @@
 #undef DEBUG_TO_FILE
 #define DEBUG_TO_FILE
 
-#if defined ( SDL ) && !defined ( LOGMESSAGES )
+#if defined ( HAVE_SDL ) && !defined ( LOGMESSAGES )
 #undef DEBUG_TO_FILE
 #endif
 
diff --git a/src/hardware/s_fmod/s_fmod.c b/src/hardware/s_fmod/s_fmod.c
index 849fd44fa4bd595154862979fdf095c0931c2e21..120d6354049be2ac58dd3d6addbb37b1d952a1cb 100644
--- a/src/hardware/s_fmod/s_fmod.c
+++ b/src/hardware/s_fmod/s_fmod.c
@@ -55,7 +55,7 @@ FILE *logstream = NULL;
 #define MAXCHANNEL 1024
 
 #undef DEBUG_TO_FILE
-#if defined ( SDL ) && !defined ( LOGMESSAGES )
+#if defined ( HAVE_SDL ) && !defined ( LOGMESSAGES )
 #define DEBUG_TO_FILE
 #endif
 
@@ -1187,7 +1187,7 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, // handle to DLL module
 	}
 	return TRUE; // Successful DLL_PROCESS_ATTACH.
 }
-#elif !defined (SDL)
+#elif !defined (HAVE_SDL)
 
 // **************************************************************************
 //                                                                  FUNCTIONS
diff --git a/src/hardware/s_openal/s_openal.c b/src/hardware/s_openal/s_openal.c
index ad842bde31d9a6638a3cb40a404169e2f259b29f..7f91ccf2c3de400608e6e16cf04da81ebb99adb3 100644
--- a/src/hardware/s_openal/s_openal.c
+++ b/src/hardware/s_openal/s_openal.c
@@ -31,7 +31,7 @@ FILE* logstream = NULL;
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <stdio.h>
-#ifndef SDL // let not make a logstream here is we are inline the HW3D in the SDL binary
+#ifndef HAVE_SDL // let not make a logstream here is we are inline the HW3D in the SDL binary
 FILE* logstream = NULL;
 #endif
 #endif
@@ -49,7 +49,7 @@ FILE* logstream = NULL;
 #include "../hw3dsdrv.h"
 
 //#undef DEBUG_TO_FILE
-//#if defined ( SDL ) && !defined ( LOGMESSAGES )
+//#if defined ( HAVE_SDL ) && !defined ( LOGMESSAGES )
 #define DEBUG_TO_FILE
 //#endif
 
diff --git a/src/m_menu.c b/src/m_menu.c
index 887ac5fcb3588480ca26bb6ecefdc16ef0f931d9..653576f4e25ed160da4248bc941bcb8ea2c3943d 100644
--- a/src/m_menu.c
+++ b/src/m_menu.c
@@ -1110,7 +1110,7 @@ static menuitem_t OP_VideoOptionsMenu[] =
 	{IT_SUBMENU|IT_STRING, NULL,   "3D Card Options...",  &OP_OpenGLOptionsDef,    20},
 #endif
 
-#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (SDL)
+#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	{IT_STRING|IT_CVAR,      NULL, "Fullscreen",          &cv_fullscreen,    30},
 #endif
 
@@ -6827,7 +6827,7 @@ static void M_VideoModeMenu(INT32 choice)
 
 	memset(modedescs, 0, sizeof(modedescs));
 
-#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (SDL)
+#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	VID_PrepareModeList(); // FIXME: hack
 #endif
 	vidm_nummodes = 0;
diff --git a/src/m_misc.c b/src/m_misc.c
index 5b16b872a16d9fd57c43d4f39b8ee9160eef0ea9..73d17c00d8e43e95b01802f314b9b757ecf6efed 100644
--- a/src/m_misc.c
+++ b/src/m_misc.c
@@ -47,7 +47,7 @@
 #include "hardware/hw_main.h"
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 #include "sdl/hwsym_sdl.h"
 #ifdef __linux__
 typedef off_t off64_t;
@@ -654,7 +654,7 @@ static void M_PNGText(png_structp png_ptr, png_infop png_info_ptr, PNG_CONST png
 	char Movietxt[] = "SRB2 Movie";
 	size_t i;
 	char interfacetxt[] =
-#ifdef SDL
+#ifdef HAVE_SDL
 	 "SDL";
 #elif defined (_WINDOWS)
 	 "DirectX";
@@ -809,7 +809,7 @@ static inline boolean M_PNGLib(void)
 		pnglib = GetModuleHandleA("libpng12.dll");
 	if (!pnglib)
 		pnglib = GetModuleHandleA("libpng13.dll");
-#elif defined (SDL)
+#elif defined (HAVE_SDL)
 #ifdef __APPLE__
 	pnglib = hwOpen("libpng.dylib");
 #else
@@ -818,7 +818,7 @@ static inline boolean M_PNGLib(void)
 #endif
 	if (!pnglib)
 		return false;
-#ifdef SDL
+#ifdef HAVE_SDL
 	apng_set_acTL = hwSym("png_set_acTL", pnglib);
 	apng_write_frame_head = hwSym("png_write_frame_head", pnglib);
 	apng_write_frame_tail = hwSym("png_write_frame_tail", pnglib);
diff --git a/src/s_sound.c b/src/s_sound.c
index 6e6c492a38d7453ecb3e9569a5215cde54ddbc42..b48b60a059bcbfae169c406e03203aefcbc67f1e 100644
--- a/src/s_sound.c
+++ b/src/s_sound.c
@@ -253,7 +253,7 @@ void S_RegisterSoundStuff(void)
 	CV_RegisterVar(&surround);
 	CV_RegisterVar(&cv_samplerate);
 
-#if defined (macintosh) && !defined (SDL) // mp3 playlist stuff
+#if defined (macintosh) && !defined (HAVE_SDL) // mp3 playlist stuff
 	{
 		INT32 i;
 		for (i = 0; i < PLAYLIST_LENGTH; i++)
@@ -761,7 +761,7 @@ void S_PauseSound(void)
 	}
 
 	// pause cd music
-#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (SDL)
+#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	I_PauseCD();
 #else
 	I_StopCD();
@@ -1050,7 +1050,7 @@ static boolean S_MIDIMusic(musicinfo_t *music, boolean looping)
 
 	// load & register it
 	music->data = W_CacheLumpNum(music->lumpnum, PU_MUSIC);
-#if defined (macintosh) && !defined (SDL)
+#if defined (macintosh) && !defined (HAVE_SDL)
 	music->handle = I_RegisterSong(music_num);
 #else
 	music->handle = I_RegisterSong(music->data, W_LumpLength(music->lumpnum));
@@ -1154,7 +1154,7 @@ void S_StopMusic(void)
 	I_StopSong(mus_playing->handle);
 	I_UnRegisterSong(mus_playing->handle);
 
-#ifndef SDL //SDL uses RWOPS
+#ifndef HAVE_SDL //SDL uses RWOPS
 	Z_ChangeTag(mus_playing->data, PU_CACHE);
 #endif
 
diff --git a/src/s_sound.h b/src/s_sound.h
index 200b5bb3fb17229b327d6314539a5a901e3b681c..6589ca598657c7e63222297e641f10f5e76b9b1b 100644
--- a/src/s_sound.h
+++ b/src/s_sound.h
@@ -37,7 +37,7 @@ extern CV_PossibleValue_t soundvolume_cons_t[];
 //part of i_cdmus.c
 extern consvar_t cd_volume, cdUpdate;
 
-#if defined (macintosh) && !defined (SDL)
+#if defined (macintosh) && !defined (HAVE_SDL)
 typedef enum
 {
 	music_normal,
diff --git a/src/sdl/Makefile.cfg b/src/sdl/Makefile.cfg
index 1f9c7204ffa45d200c2ab9c08b64db19e88abc31..1d404c4c9393240e7e3bc147f360f977cb7b589f 100644
--- a/src/sdl/Makefile.cfg
+++ b/src/sdl/Makefile.cfg
@@ -67,7 +67,7 @@ endif
 
 	OBJS+=$(OBJDIR)/i_video.o $(OBJDIR)/dosstr.o $(OBJDIR)/endtxt.o $(OBJDIR)/hwsym_sdl.o
 
-	OPTS+=-DDIRECTFULLSCREEN -DSDL
+	OPTS+=-DDIRECTFULLSCREEN -DHAVE_SDL
 
 ifndef NOHW
 	OBJS+=$(OBJDIR)/r_opengl.o $(OBJDIR)/ogl_sdl.o
diff --git a/src/sdl/Srb2SDL-vc10.vcxproj b/src/sdl/Srb2SDL-vc10.vcxproj
index 192f191561fdb2441a1bb8ce6c630ab565039da4..958cd7d02877eac200c0baee40ec625a093f60a5 100644
--- a/src/sdl/Srb2SDL-vc10.vcxproj
+++ b/src/sdl/Srb2SDL-vc10.vcxproj
@@ -96,7 +96,7 @@
     <ClCompile>
       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>true</MinimalRebuild>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -145,7 +145,7 @@
     <ClCompile>
       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>true</MinimalRebuild>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -202,7 +202,7 @@
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <OmitFramePointers>true</OmitFramePointers>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <PrecompiledHeaderOutputFile>.\..\..\objs\VC10\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch</PrecompiledHeaderOutputFile>
@@ -258,7 +258,7 @@
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <OmitFramePointers>true</OmitFramePointers>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <PrecompiledHeaderOutputFile>.\..\..\objs\VC10\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch</PrecompiledHeaderOutputFile>
@@ -1461,4 +1461,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/sdl/Srb2SDL-vc9.vcproj b/src/sdl/Srb2SDL-vc9.vcproj
index 620202bdfe240232db540e282739d2217f2bd39b..d2a268f8d44f501b141ffa4de48eea5fed1e5f32 100644
--- a/src/sdl/Srb2SDL-vc9.vcproj
+++ b/src/sdl/Srb2SDL-vc9.vcproj
@@ -50,7 +50,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="1"
@@ -145,7 +145,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="1"
@@ -248,7 +248,7 @@
 				FavorSizeOrSpeed="1"
 				OmitFramePointers="true"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				StringPooling="true"
 				RuntimeLibrary="0"
 				PrecompiledHeaderFile=".\..\..\objs\VC9\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch"
@@ -350,7 +350,7 @@
 				FavorSizeOrSpeed="1"
 				OmitFramePointers="true"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				StringPooling="true"
 				RuntimeLibrary="0"
 				PrecompiledHeaderFile=".\..\..\objs\VC9\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch"
diff --git a/src/sdl/Srb2SDL.dsp b/src/sdl/Srb2SDL.dsp
index 02c3b270109e383127375df4b1dfaa860b728f4b..879113ca2f0d7c6f8a71e7e709303224046cb91f 100644
--- a/src/sdl/Srb2SDL.dsp
+++ b/src/sdl/Srb2SDL.dsp
@@ -45,7 +45,7 @@ MTL=midl.exe
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
-# ADD CPP /nologo /G5 /W3 /GX /Zi /Ot /Og /Oi /Op /Oy /Ob1 /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "NDEBUG" /D "SDLMAIN" /D "NO_STDIO_REDIRECT" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GF /c
+# ADD CPP /nologo /G5 /W3 /GX /Zi /Ot /Og /Oi /Op /Oy /Ob1 /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "NDEBUG" /D "SDLMAIN" /D "NO_STDIO_REDIRECT" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "HAVE_SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GF /c
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
 # ADD RSC /l 0x409 /d "NDEBUG"
 # SUBTRACT RSC /x
@@ -72,7 +72,7 @@ LINK32=link.exe
 # PROP Target_Dir ""
 MTL=midl.exe
 # ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
-# ADD CPP /nologo /G6 /W4 /WX /Gm /GX /ZI /Od /Op /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "_DEBUG" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GZ /c
+# ADD CPP /nologo /G6 /W4 /WX /Gm /GX /ZI /Od /Op /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "_DEBUG" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "HAVE_SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GZ /c
 # SUBTRACT CPP /YX
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
 # ADD RSC /l 0x409 /d "_DEBUG"
diff --git a/src/sdl/hwsym_sdl.c b/src/sdl/hwsym_sdl.c
index 43c71f7bf2274980ae56e2c354a7aa8212fa1f73..44ddf830ca43f4eafc8049c31089b7ecb2a6d1cd 100644
--- a/src/sdl/hwsym_sdl.c
+++ b/src/sdl/hwsym_sdl.c
@@ -29,7 +29,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl/i_cdmus.c b/src/sdl/i_cdmus.c
index adab39c902ce9ed215f630a7daaf76c2477f050f..1eeac370b25d27d438fb532087f4a3458c1762b0 100644
--- a/src/sdl/i_cdmus.c
+++ b/src/sdl/i_cdmus.c
@@ -17,7 +17,7 @@
 /// \brief cd music interface
 ///
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #if defined (DC) || defined (_WIN32_WCE) || defined(GP2X) || defined(_PS3)
 #define NOSDLCD
diff --git a/src/sdl/i_main.c b/src/sdl/i_main.c
index 85abb704144a650f70d0308879f945361d28c1d0..1c438e0834f97aed1c15d962c9e982c246892921 100644
--- a/src/sdl/i_main.c
+++ b/src/sdl/i_main.c
@@ -48,7 +48,7 @@ PSP_MAIN_THREAD_NAME("SRB2");
 PSP_MAIN_THREAD_STACK_SIZE_KB(256);
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #ifdef HAVE_TTF
 #include "SDL.h"
diff --git a/src/sdl/i_net.c b/src/sdl/i_net.c
index c31935acf237edbeba60b25d65ae416f4af11eae..ee4a34c13dd8d4d10950d53d972d0cf873068943 100644
--- a/src/sdl/i_net.c
+++ b/src/sdl/i_net.c
@@ -32,7 +32,7 @@
 
 #include "../i_tcp.h"
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #ifdef HAVE_SDLNET
 
diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index 1e03edd88382245dea28ea95ea4ecad8b27df1f4..888a6a507637e5a6c5d4e2c5de9099fcf34933d1 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -73,7 +73,7 @@ void __set_fpscr(long); // in libgcc / kernel's startup.s?
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl/i_video.c b/src/sdl/i_video.c
index 1a2305fefcb6f577ed1312e1fb7bb679440c455d..197924edacceed81f86529616221bb649e0b80ae 100644
--- a/src/sdl/i_video.c
+++ b/src/sdl/i_video.c
@@ -27,7 +27,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj b/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj
index 1b1a9fdf6bf1723095acc16f4cb835b6abfe5288..5c34c55c5f38ed4f241c2834f17f7e7236ed3e15 100644
--- a/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj
+++ b/src/sdl/macosx/Srb2mac.xcodeproj/project.pbxproj
@@ -1264,7 +1264,7 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					MAC_ALERT,
 					SDLMAIN,
-					SDL,
+					HAVE_SDL,
 					HAVE_MIXER,
 					HAVE_PNG,
 					HAVE_BLUA,
@@ -1386,7 +1386,7 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					MAC_ALERT,
 					SDLMAIN,
-					SDL,
+					HAVE_SDL,
 					HAVE_MIXER,
 					HAVE_PNG,
 					HAVE_BLUA,
diff --git a/src/sdl/mixer_sound.c b/src/sdl/mixer_sound.c
index 98159b47368c3996124ff78343bef212b5b298d4..151668752c5341ac68423483bbade4ac9c6c3573 100644
--- a/src/sdl/mixer_sound.c
+++ b/src/sdl/mixer_sound.c
@@ -3,7 +3,7 @@
 
 #include "../doomdef.h"
 
-#if defined(SDL) && defined(HAVE_MIXER) && SOUND==SOUND_MIXER
+#if defined(HAVE_SDL) && defined(HAVE_MIXER) && SOUND==SOUND_MIXER
 
 #include "../sounds.h"
 #include "../s_sound.h"
diff --git a/src/sdl/ogl_sdl.c b/src/sdl/ogl_sdl.c
index 9427d3317eba3f1ac5ab7e36ab55082231d9bedf..e726bf07dd06370efd4aad22a0f45105f24c9f33 100644
--- a/src/sdl/ogl_sdl.c
+++ b/src/sdl/ogl_sdl.c
@@ -21,7 +21,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl/sdl_sound.c b/src/sdl/sdl_sound.c
index 3750e67789f1d1af7676133f1ebd30184c31a32a..6ba83104ee81033a0f9bb4935ecf25adfda1115e 100644
--- a/src/sdl/sdl_sound.c
+++ b/src/sdl/sdl_sound.c
@@ -23,7 +23,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#if defined(SDL) && SOUND==SOUND_SDL
+#if defined(HAVE_SDL) && SOUND==SOUND_SDL
 
 #include "SDL.h"
 
@@ -2027,4 +2027,4 @@ static void SDLCALL I_FinishMusic(void)
 	if (Msc_Mutex) SDL_UnlockMutex(Msc_Mutex);
 }
 #endif
-#endif //SDL
+#endif //HAVE_SDL
diff --git a/src/sdl2/Srb2SDL-vc10.vcxproj b/src/sdl2/Srb2SDL-vc10.vcxproj
index 192f191561fdb2441a1bb8ce6c630ab565039da4..958cd7d02877eac200c0baee40ec625a093f60a5 100644
--- a/src/sdl2/Srb2SDL-vc10.vcxproj
+++ b/src/sdl2/Srb2SDL-vc10.vcxproj
@@ -96,7 +96,7 @@
     <ClCompile>
       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>true</MinimalRebuild>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -145,7 +145,7 @@
     <ClCompile>
       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>true</MinimalRebuild>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -202,7 +202,7 @@
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <OmitFramePointers>true</OmitFramePointers>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <PrecompiledHeaderOutputFile>.\..\..\objs\VC10\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch</PrecompiledHeaderOutputFile>
@@ -258,7 +258,7 @@
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <OmitFramePointers>true</OmitFramePointers>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\libs\libpng-src;$(ProjectDir)..\..\libs\zlib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;COMPVERSION;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <PrecompiledHeaderOutputFile>.\..\..\objs\VC10\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch</PrecompiledHeaderOutputFile>
@@ -1461,4 +1461,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/sdl2/Srb2SDL-vc9.vcproj b/src/sdl2/Srb2SDL-vc9.vcproj
index 620202bdfe240232db540e282739d2217f2bd39b..d2a268f8d44f501b141ffa4de48eea5fed1e5f32 100644
--- a/src/sdl2/Srb2SDL-vc9.vcproj
+++ b/src/sdl2/Srb2SDL-vc9.vcproj
@@ -50,7 +50,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="1"
@@ -145,7 +145,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="_DEBUG;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="1"
@@ -248,7 +248,7 @@
 				FavorSizeOrSpeed="1"
 				OmitFramePointers="true"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;USEASM;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				StringPooling="true"
 				RuntimeLibrary="0"
 				PrecompiledHeaderFile=".\..\..\objs\VC9\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch"
@@ -350,7 +350,7 @@
 				FavorSizeOrSpeed="1"
 				OmitFramePointers="true"
 				AdditionalIncludeDirectories="&quot;$(ProjectDir)..\..\libs\libpng-src&quot;;&quot;$(ProjectDir)..\..\libs\zlib&quot;"
-				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
+				PreprocessorDefinitions="NDEBUG;SDLMAIN;NO_STDIO_REDIRECT;USE_WGL_SWAP;DIRECTFULLSCREEN;HAVE_SDL;HWRENDER;HW3SOUND;HAVE_FILTER;HAVE_MIXER;HAVE_PNG;HAVE_BLUA;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_DEPRECATE"
 				StringPooling="true"
 				RuntimeLibrary="0"
 				PrecompiledHeaderFile=".\..\..\objs\VC9\$(Platform)\$(Configuration)\SDL\Srb2SDL-vc9.pch"
diff --git a/src/sdl2/Srb2SDL.dsp b/src/sdl2/Srb2SDL.dsp
index 02c3b270109e383127375df4b1dfaa860b728f4b..879113ca2f0d7c6f8a71e7e709303224046cb91f 100644
--- a/src/sdl2/Srb2SDL.dsp
+++ b/src/sdl2/Srb2SDL.dsp
@@ -45,7 +45,7 @@ MTL=midl.exe
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
-# ADD CPP /nologo /G5 /W3 /GX /Zi /Ot /Og /Oi /Op /Oy /Ob1 /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "NDEBUG" /D "SDLMAIN" /D "NO_STDIO_REDIRECT" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GF /c
+# ADD CPP /nologo /G5 /W3 /GX /Zi /Ot /Og /Oi /Op /Oy /Ob1 /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "NDEBUG" /D "SDLMAIN" /D "NO_STDIO_REDIRECT" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "HAVE_SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GF /c
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
 # ADD RSC /l 0x409 /d "NDEBUG"
 # SUBTRACT RSC /x
@@ -72,7 +72,7 @@ LINK32=link.exe
 # PROP Target_Dir ""
 MTL=midl.exe
 # ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
-# ADD CPP /nologo /G6 /W4 /WX /Gm /GX /ZI /Od /Op /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "_DEBUG" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GZ /c
+# ADD CPP /nologo /G6 /W4 /WX /Gm /GX /ZI /Od /Op /I "..\..\libs\libpng-src" /I "..\..\libs\zlib" /D "_DEBUG" /D "USE_WGL_SWAP" /D "DIRECTFULLSCREEN" /D "HAVE_SDL" /D "HWRENDER" /D "HW3SOUND" /D "HAVE_FILTER" /D "HAVE_MIXER" /D "USEASM" /D "HAVE_PNG" /FR /FD /GZ /c
 # SUBTRACT CPP /YX
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
 # ADD RSC /l 0x409 /d "_DEBUG"
diff --git a/src/sdl2/hwsym_sdl.c b/src/sdl2/hwsym_sdl.c
index 43c71f7bf2274980ae56e2c354a7aa8212fa1f73..44ddf830ca43f4eafc8049c31089b7ecb2a6d1cd 100644
--- a/src/sdl2/hwsym_sdl.c
+++ b/src/sdl2/hwsym_sdl.c
@@ -29,7 +29,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl2/i_main.c b/src/sdl2/i_main.c
index 85abb704144a650f70d0308879f945361d28c1d0..1c438e0834f97aed1c15d962c9e982c246892921 100644
--- a/src/sdl2/i_main.c
+++ b/src/sdl2/i_main.c
@@ -48,7 +48,7 @@ PSP_MAIN_THREAD_NAME("SRB2");
 PSP_MAIN_THREAD_STACK_SIZE_KB(256);
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #ifdef HAVE_TTF
 #include "SDL.h"
diff --git a/src/sdl2/i_net.c b/src/sdl2/i_net.c
index c31935acf237edbeba60b25d65ae416f4af11eae..ee4a34c13dd8d4d10950d53d972d0cf873068943 100644
--- a/src/sdl2/i_net.c
+++ b/src/sdl2/i_net.c
@@ -32,7 +32,7 @@
 
 #include "../i_tcp.h"
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #ifdef HAVE_SDLNET
 
diff --git a/src/sdl2/i_system.c b/src/sdl2/i_system.c
index 231d06b8baa3aa180a74b1f034d22b1320cf90a7..cfc2e210da91fd07267deb58fd58a0a2062628ae 100644
--- a/src/sdl2/i_system.c
+++ b/src/sdl2/i_system.c
@@ -73,7 +73,7 @@ void __set_fpscr(long); // in libgcc / kernel's startup.s?
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl2/i_ttf.c b/src/sdl2/i_ttf.c
index 770a81d98596d463248e5b7e032e1bbb835df699..4a41f120e81d88d4234b840afb8eeec35970ee2b 100644
--- a/src/sdl2/i_ttf.c
+++ b/src/sdl2/i_ttf.c
@@ -16,7 +16,7 @@
 /// \file
 /// \brief SDL_ttf interface code. Necessary for platforms with no framebuffer console systems.
 
-#if defined(SDL) && defined(HAVE_TTF)
+#if defined(HAVE_SDL) && defined(HAVE_TTF)
 #include "SDL.h"
 #include "SDL_ttf.h"
 #include "../doomdef.h"
diff --git a/src/sdl2/i_video.c b/src/sdl2/i_video.c
index 03b6d8faac9866c3f3f39a64c2fbc482d4d4824b..f7b0ff07d3708bd0127fef03971d17d7f8a2946a 100644
--- a/src/sdl2/i_video.c
+++ b/src/sdl2/i_video.c
@@ -25,7 +25,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl2/macosx/Srb2mac.xcodeproj/project.pbxproj b/src/sdl2/macosx/Srb2mac.xcodeproj/project.pbxproj
index 1b1a9fdf6bf1723095acc16f4cb835b6abfe5288..5c34c55c5f38ed4f241c2834f17f7e7236ed3e15 100644
--- a/src/sdl2/macosx/Srb2mac.xcodeproj/project.pbxproj
+++ b/src/sdl2/macosx/Srb2mac.xcodeproj/project.pbxproj
@@ -1264,7 +1264,7 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					MAC_ALERT,
 					SDLMAIN,
-					SDL,
+					HAVE_SDL,
 					HAVE_MIXER,
 					HAVE_PNG,
 					HAVE_BLUA,
@@ -1386,7 +1386,7 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					MAC_ALERT,
 					SDLMAIN,
-					SDL,
+					HAVE_SDL,
 					HAVE_MIXER,
 					HAVE_PNG,
 					HAVE_BLUA,
diff --git a/src/sdl2/mixer_sound.c b/src/sdl2/mixer_sound.c
index e8c62d70fe0e4332e0227fb11ef61dd4bda26490..8c90557f04145ebe451c3f9867714f4707f901f5 100644
--- a/src/sdl2/mixer_sound.c
+++ b/src/sdl2/mixer_sound.c
@@ -3,7 +3,7 @@
 
 #include "../doomdef.h"
 
-#if defined(SDL) && defined(HAVE_MIXER) && SOUND==SOUND_MIXER
+#if defined(HAVE_SDL) && defined(HAVE_MIXER) && SOUND==SOUND_MIXER
 
 #include "../sounds.h"
 #include "../s_sound.h"
diff --git a/src/sdl2/ogl_sdl.c b/src/sdl2/ogl_sdl.c
index b03d8e20e591d0825f79f1f8c73f86b6aad07f36..62055e10401e3b32cf0a4a34ba9c7f5a4bf9da2b 100644
--- a/src/sdl2/ogl_sdl.c
+++ b/src/sdl2/ogl_sdl.c
@@ -21,7 +21,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#ifdef SDL
+#ifdef HAVE_SDL
 
 #include "SDL.h"
 
diff --git a/src/sdl2/sdl_sound.c b/src/sdl2/sdl_sound.c
index cc369637841e811687eab64e067f2ea47505bf60..5d6c007b5696beca42b92e01ec2fa73531a8244c 100644
--- a/src/sdl2/sdl_sound.c
+++ b/src/sdl2/sdl_sound.c
@@ -23,7 +23,7 @@
 #pragma warning(disable : 4214 4244)
 #endif
 
-#if defined(SDL) && SOUND==SOUND_SDL
+#if defined(HAVE_SDL) && SOUND==SOUND_SDL
 
 #include "SDL.h"
 
@@ -2028,4 +2028,4 @@ static void SDLCALL I_FinishMusic(void)
 	if (Msc_Mutex) SDL_UnlockMutex(Msc_Mutex);
 }
 #endif
-#endif //SDL
+#endif //HAVE_SDL
diff --git a/src/v_video.c b/src/v_video.c
index 9daead7888b155ee4d6cb1c4977175479d4cff1c..d6ab2eef1bf52bf8312138d37e58cd9609f5a76c 100644
--- a/src/v_video.c
+++ b/src/v_video.c
@@ -222,7 +222,7 @@ void V_SetPalette(INT32 palettenum)
 #ifdef HWRENDER
 	if (rendermode != render_soft && rendermode != render_none)
 		HWR_SetPalette(&pLocalPalette[palettenum*256]);
-#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (SDL)
+#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	else
 #endif
 #endif
@@ -236,7 +236,7 @@ void V_SetPaletteLump(const char *pal)
 #ifdef HWRENDER
 	if (rendermode != render_soft && rendermode != render_none)
 		HWR_SetPalette(pLocalPalette);
-#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (SDL)
+#if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	else
 #endif
 #endif