diff --git a/util/ncgg/output.c b/util/ncgg/output.c
index 55d7587ff..1f4cb32b6 100644
--- a/util/ncgg/output.c
+++ b/util/ncgg/output.c
@@ -671,7 +671,7 @@ void outars()
 
 void finishio() 
 {
-	int nregs = 0;
+	extern int nregs;
 
 	finishcode();
 	hashpatterns();