diff --git a/kernel/signal.c b/kernel/signal.c
index 6771027..e9d3270 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3215,6 +3215,7 @@ SYSCALL_DEFINE1(ssetmask, int, newmask)
 	int old = current->blocked.sig[0];
 	sigset_t newset;

+	siginitset(&newset, newmask);
 	set_current_blocked(&newset);

 	return old;