diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 9a85bfbbc45a..baa20c85799d 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -1347,7 +1347,7 @@ static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now)
 {
 	struct ioc *ioc = iocg->ioc;
 	struct blkcg_gq *blkg = iocg_to_blkg(iocg);
-	u64 tdelta, delay, new_delay;
+	u64 tdelta, delay, new_delay, shift;
 	s64 vover, vover_pct;
 	u32 hwa;
 
@@ -1362,8 +1362,9 @@ static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now)
 
 	/* calculate the current delay in effect - 1/2 every second */
 	tdelta = now->now - iocg->delay_at;
-	if (iocg->delay)
-		delay = iocg->delay >> div64_u64(tdelta, USEC_PER_SEC);
+	shift = div64_u64(tdelta, USEC_PER_SEC);
+	if (iocg->delay && shift < BITS_PER_LONG)
+		delay = iocg->delay >> shift;
 	else
 		delay = 0;