diff --git a/include/linux/signal.h b/include/linux/signal.h
index ba009c1..782546d 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -242,6 +242,8 @@
 extern long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig,
 				 siginfo_t *info);
 extern long do_sigpending(void __user *, unsigned long);
+extern int do_sigtimedwait(const sigset_t *, siginfo_t *,
+				const struct timespec *);
 extern int sigprocmask(int, sigset_t *, sigset_t *);
 extern void set_current_blocked(const sigset_t *);
 extern int show_unhandled_signals;