diff --git a/kernel/signal.c b/kernel/signal.c
index 95a9d9d..b9be7e0 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2382,6 +2382,12 @@
 {
 	sigset_t blocked;
 
+	/* A signal was successfully delivered, and the
+	   saved sigmask was stored on the signal frame,
+	   and will be restored by sigreturn.  So we can
+	   simply clear the restore sigmask flag.  */
+	clear_restore_sigmask();
+
 	sigorsets(&blocked, &current->blocked, &ka->sa.sa_mask);
 	if (!(ka->sa.sa_flags & SA_NODEFER))
 		sigaddset(&blocked, signr);