diff --git a/drivers/md/md.c b/drivers/md/md.c
index b61040315aef..58fb5453a819 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -9448,6 +9448,8 @@ static void md_clone_bio(struct mddev *mddev, struct bio **bio)
 	md_io_clone->mddev = mddev;
 	if (blk_queue_io_stat(bdev->bd_disk->queue))
 		md_io_clone->start_time = bio_start_io_acct(*bio);
+	else
+		md_io_clone->start_time = 0;
 
 	if (bio_data_dir(*bio) == WRITE && md_bitmap_enabled(mddev, false)) {
 		md_io_clone->offset = (*bio)->bi_iter.bi_sector;