diff --git a/src/doomdef.h b/src/doomdef.h
index 4d3934773..7730a4df0 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -163,7 +163,7 @@ extern FILE *logstream;
 
 // Does this version require an added patch file?
 // Comment or uncomment this as necessary.
-//#define USE_PATCH_FILE
+#define USE_PATCH_FILE
 
 // Use .kart extension addons
 #define USE_KART