diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 1e772287b1c8e7fa2ec54724c12d69526fbc57fa..aa88bdeb9978a2bb83e0fccc0041ba543c150f1a 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;
 	}