diff --git a/kernel/signal.c b/kernel/signal.c
index b373fc2..01a1e7f 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2702,6 +2702,7 @@
 
 	new_sa.sa.sa_handler = handler;
 	new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
+	sigemptyset(&new_sa.sa.sa_mask);
 
 	ret = do_sigaction(sig, &new_sa, &old_sa);