diff --git a/include/QF/zone.h b/include/QF/zone.h
index 1d5d83c0e..4cf1ede22 100644
--- a/include/QF/zone.h
+++ b/include/QF/zone.h
@@ -98,6 +98,7 @@ typedef struct memzone_s memzone_t;
 
 void Memory_Init (void *buf, int size);
 
+void Z_ClearZone (memzone_t *zone, int size);
 void Z_Free (memzone_t *zone, void *ptr);
 void *Z_Malloc (memzone_t *zone, int size);			// returns 0 filled memory
 void *Z_TagMalloc (memzone_t *zone, int size, int tag);