diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index c53716487e771ac7ec51577b309af2a5478959db..8d65bd0383fcf53ce6776ce5a23af13757e2101b 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -112,7 +112,7 @@ static void fixup_clock_comparator(unsigned long long delta)
 static int s390_next_ktime(ktime_t expires,
 			   struct clock_event_device *evt)
 {
-	s64 nsecs;
+	u64 nsecs;
 
 	nsecs = ktime_to_ns(ktime_sub(expires, ktime_get_monotonic_offset()));
 	do_div(nsecs, 125);