diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 449c4dd..204adde 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -616,7 +616,7 @@ 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;
 	}