diff --git a/usr.sbin/yppush/yppush_main.c b/usr.sbin/yppush/yppush_main.c
index ba25dda2a8d..3e693aaf814 100644
--- a/usr.sbin/yppush/yppush_main.c
+++ b/usr.sbin/yppush/yppush_main.c
@@ -651,6 +651,7 @@ main(argc,argv)
 	sigaddset(&sa.sa_mask, SIGALRM);
 	sigaddset(&sa.sa_mask, SIGINT);
 	sa.sa_handler = async_handler;
+	sa.sa_flags = 0;
 
 	sigaction(SIGIO, &sa, NULL);