diff --git a/main/autoservice.c b/main/autoservice.c
index 636e95dd36..1f18dee25f 100644
--- a/main/autoservice.c
+++ b/main/autoservice.c
@@ -101,6 +101,10 @@ static void *autoservice_run(void *ign)
 
 		AST_LIST_UNLOCK(&aslist);
 
+		if (!x) {
+			continue;
+		}
+
 		chan = ast_waitfor_n(mons, x, &ms);
 		if (!chan) {
 			continue;