diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index f61693e596845aebafbbedb8f940e0eaec9b0bee..3956ea502f970598ea8b796160fa4c2e27842b5c 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -615,7 +615,7 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
 		tmp_dev = map_sector(mddev, zone, sector, &sector);
 		break;
 	default:
-		WARN("md/raid0:%s: Invalid layout\n", mdname(mddev));
+		WARN(1, "md/raid0:%s: Invalid layout\n", mdname(mddev));
 		bio_io_error(bio);
 		return true;
 	}