diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index aa024f2..1455b76 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1268,7 +1268,11 @@
 	hrtimer_peek_ahead_timers();
 }
 
-#endif	/* CONFIG_HIGH_RES_TIMERS */
+#else /* CONFIG_HIGH_RES_TIMERS */
+
+static inline void __hrtimer_peek_ahead_timers(void) { }
+
+#endif	/* !CONFIG_HIGH_RES_TIMERS */
 
 /*
  * Called from timer softirq every jiffy, expire hrtimers: