diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 77b9953..de61892 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -463,7 +463,7 @@
 	 * holding "epmutex" we can be sure that no file cleanup code will hit
 	 * us during this operation. So we can avoid the lock on "ep->lock".
 	 */
-	while ((rbp = rb_first(&ep->rbr)) != 0) {
+	while ((rbp = rb_first(&ep->rbr)) != NULL) {
 		epi = rb_entry(rbp, struct epitem, rbn);
 		ep_remove(ep, epi);
 	}