diff --git a/src/gc.c b/src/gc.c
index c6c10f4..1dbd65b 100755
--- a/src/gc.c
+++ b/src/gc.c
@@ -39,7 +39,7 @@ static char *id = "$Id: gc.c,v 1.3 1999/05/31 23:35:29 sybalsky Exp $ Copyright
 
 ***********************************************************/
  
-OP_gcref(void)
+void OP_gcref(void)
 {
 #ifdef TRACE
 	printPC();