diff --git a/src/w_wad.h b/src/w_wad.h
index b518b7d39..41900eb1d 100644
--- a/src/w_wad.h
+++ b/src/w_wad.h
@@ -92,7 +92,7 @@ struct virtres_t {
 virtres_t* vres_GetMap(lumpnum_t);
 void vres_Free(virtres_t*);
 virtlump_t* vres_Find(const virtres_t*, const char*);
-void* vres_GetPatch(virtlump_t *vlump, INT32);
+void* vres_GetPatch(virtlump_t *vlump, INT32 tag);
 
 // =========================================================================
 //                         DYNAMIC WAD LOADING