diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h
index 1f6f6f9a6a37..3bc5b74c342f 100644
--- a/kernel/time/posix-timers.h
+++ b/kernel/time/posix-timers.h
@@ -19,6 +19,8 @@ struct k_clock {
 	void	(*timer_get)(struct k_itimer *timr,
 			     struct itimerspec64 *cur_setting);
 	void	(*timer_rearm)(struct k_itimer *timr);
+	int	(*timer_forward)(struct k_itimer *timr, ktime_t now);
+	ktime_t	(*timer_remaining)(struct k_itimer *timr, ktime_t now);
 };
 
 extern const struct k_clock clock_posix_cpu;