diff --git a/drivers/md/dm-mpath-rdac.c b/drivers/md/dm-mpath-rdac.c
index 8b776b8..16b1613 100644
--- a/drivers/md/dm-mpath-rdac.c
+++ b/drivers/md/dm-mpath-rdac.c
@@ -292,7 +292,7 @@
 	rq->end_io_data = h;
 	rq->timeout = h->timeout;
 	rq->cmd_type = REQ_TYPE_BLOCK_PC;
-	rq->cmd_flags = REQ_FAILFAST | REQ_NOMERGE;
+	rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE;
 	return rq;
 }