diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index e86e1c6..50953f4 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -158,16 +158,13 @@
 {
 	ktime_t delta;
 
-	ts->idle_lastupdate = now;
 	if (ts->idle_active) {
 		delta = ktime_sub(now, ts->idle_entrytime);
 		ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
 		ts->idle_entrytime = now;
 	}
 
-	if (ts->idle_active && last_update_time)
-		*last_update_time = ktime_to_us(ts->idle_lastupdate);
-	else
+	if (last_update_time)
 		*last_update_time = ktime_to_us(now);
 
 }