diff --git a/block/genhd.c b/block/genhd.c
index e9094b3..dadf42b 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -512,7 +512,7 @@
 
 	ddev->parent = disk->driverfs_dev;
 
-	dev_set_name(ddev, disk->disk_name);
+	dev_set_name(ddev, "%s", disk->disk_name);
 
 	/* delay uevents, until we scanned partition table */
 	dev_set_uevent_suppress(ddev, 1);