diff --git a/reactos/include/wine/debug.h b/reactos/include/wine/debug.h
index 0d562c67be9..51f24ab834f 100644
--- a/reactos/include/wine/debug.h
+++ b/reactos/include/wine/debug.h
@@ -12,7 +12,7 @@
 
 unsigned long DbgPrint(char *Format,...);
 
-#if DBG
+#ifdef DBG
 #define DPRINT1 DbgPrint("(%s:%d:%s) ",__FILE__,__LINE__,__FUNCTION__), DbgPrint
 #else
 #define DPRINT1(args...)