diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index a91049e05219..baa11912cc94 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -198,6 +198,7 @@ out:
 	atomic_set(&dc->may_delay, 1);
 
 	ti->num_flush_requests = 1;
+	ti->num_discard_requests = 1;
 	ti->private = dc;
 	return 0;