diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 0d041a9..1fe28e4 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -376,7 +376,7 @@
 	struct autofs_wait_queue *wq, **wql;
 
 	mutex_lock(&sbi->wq_mutex);
-	for (wql = &sbi->queues ; (wq = *wql) != 0 ; wql = &wq->next) {
+	for (wql = &sbi->queues; (wq = *wql) != NULL; wql = &wq->next) {
 		if (wq->wait_queue_token == wait_queue_token)
 			break;
 	}