diff --git a/engine/common/common.c b/engine/common/common.c
index cd331c235..f7c5ae3b4 100644
--- a/engine/common/common.c
+++ b/engine/common/common.c
@@ -2298,6 +2298,8 @@ typedef struct
 char	com_gamedir[MAX_OSPATH];
 char	com_basedir[MAX_OSPATH];
 
+#define ZEXPORT VARGS
+
 #ifdef ZLIB
 #ifdef _WIN32
 #pragma comment( lib, "../libs/zlib.lib" )