diff --git a/sys/sys/timers.h b/sys/sys/timers.h
index 8a2d771685db..f143f03787eb 100644
--- a/sys/sys/timers.h
+++ b/sys/sys/timers.h
@@ -112,7 +112,6 @@ struct	kclock {
 #define	ITIMER_EV_EXEC	0
 #define	ITIMER_EV_EXIT	1
 
-void	itimers_event_hook(struct proc *p, int event);
 int	itimer_accept(struct proc *p, timer_t tid, ksiginfo_t *ksi);
 #endif
 #endif /* !_SYS_TIMERS_H_ */