diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0df7231..0cb4f09 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2160,7 +2160,7 @@
 extern int kill_pgrp(struct pid *pid, int sig, int priv);
 extern int kill_pid(struct pid *pid, int sig, int priv);
 extern int kill_proc_info(int, struct siginfo *, pid_t);
-extern bool do_notify_parent(struct task_struct *, int);
+extern __must_check bool do_notify_parent(struct task_struct *, int);
 extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);
 extern void force_sig(int, struct task_struct *);
 extern int send_sig(int, struct task_struct *, int);