diff --git a/kernel/sched.c b/kernel/sched.c
index 35ef06c9921..461ee900d1a 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -96,10 +96,9 @@ unsigned long long __attribute__((weak)) sched_clock(void)
 #define MAX_USER_PRIO		(USER_PRIO(MAX_PRIO))
 
 /*
- * Some helpers for converting nanosecond timing to jiffy resolution
+ * Helpers for converting nanosecond timing to jiffy resolution
  */
 #define NS_TO_JIFFIES(TIME)	((unsigned long)(TIME) / (NSEC_PER_SEC / HZ))
-#define JIFFIES_TO_NS(TIME)	((TIME) * (NSEC_PER_SEC / HZ))
 
 #define NICE_0_LOAD		SCHED_LOAD_SCALE
 #define NICE_0_SHIFT		SCHED_LOAD_SHIFT