diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3d95c48..28000b1 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1317,6 +1317,7 @@
 
 extern void proc_caches_init(void);
 extern void flush_signals(struct task_struct *);
+extern void ignore_signals(struct task_struct *);
 extern void flush_signal_handlers(struct task_struct *, int force_default);
 extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);