diff --git a/src/sdl/CMakeLists.txt b/src/sdl/CMakeLists.txt
index bb5edf8170e486974c03e9a0e13437348d8eebd1..a7f015c869c783537dccfff26bad85de9c68f5f5 100644
--- a/src/sdl/CMakeLists.txt
+++ b/src/sdl/CMakeLists.txt
@@ -272,7 +272,7 @@ if(${SDL2_FOUND})
 	endif()
 
 	target_compile_definitions(SRB2SDL2 PRIVATE
-		-DDDIRECTFULLSCREEN -DHAVE_SDL
+		-DDIRECTFULLSCREEN -DHAVE_SDL
 	)
 
 	## strip debug symbols into separate file when using gcc.