diff --git a/src/d_clisrv.h b/src/d_clisrv.h
index f67fbe4bf47ea62266fb2be89375c0a43f23b82c..9d1d63a09da3d9ab690f00a10396f21e76efe974 100644
--- a/src/d_clisrv.h
+++ b/src/d_clisrv.h
@@ -26,7 +26,7 @@ The 'packet version' is used to distinguish packet formats.
 This version is independent of VERSION and SUBVERSION. Different
 applications may follow different packet versions.
 */
-#define PACKETVERSION 3
+#define PACKETVERSION 4
 
 // Network play related stuff.
 // There is a data struct that stores network