diff --git a/block/elevator.c b/block/elevator.c
index 902dd13..1f5bfe6 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -86,6 +86,12 @@
 	if (rq->rq_disk != bio->bi_bdev->bd_disk || rq->special)
 		return 0;
 
+	/*
+	 * only merge integrity protected bio into ditto rq
+	 */
+	if (bio_integrity(bio) != blk_integrity_rq(rq))
+		return 0;
+
 	if (!elv_iosched_allow_merge(rq, bio))
 		return 0;