diff --git a/kqueue.c b/kqueue.c
index 111427c0dd..920129826f 100644
--- a/kqueue.c
+++ b/kqueue.c
@@ -147,7 +147,7 @@ kq_init(struct event_base *base)
 	 */
 	if (kevent(kq,
 		kqueueop->changes, 1, kqueueop->events, NEVENT, NULL) != 1 ||
-	    kqueueop->events[0].ident != -1 ||
+	    (int)kqueueop->events[0].ident != -1 ||
 	    kqueueop->events[0].flags != EV_ERROR) {
 		event_warn("%s: detected broken kqueue; not using.", __func__);
 		goto err;