diff --git a/shell/ash.c b/shell/ash.c
index 10c0b6110..9c762e2ed 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -8887,7 +8887,7 @@ pushstring(char *s, void *ap)
 	INT_OFF;
 /*dprintf("*** calling pushstring: %s, %d\n", s, len);*/
 	if (parsefile->strpush) {
-		sp = ckzmalloc(sizeof(struct strpush));
+		sp = ckzalloc(sizeof(struct strpush));
 		sp->prev = parsefile->strpush;
 		parsefile->strpush = sp;
 	} else