diff --git a/block/genhd.c b/block/genhd.c
index 4e5e7493f6764e8f3a03b62e40bd40b724d15880..27549e470da54d858e3bccd99946e2db2a311fa6 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -768,6 +768,8 @@ static int __init genhd_device_init(void)
 	bdev_map = kobj_map_init(base_probe, &block_class_lock);
 	blk_dev_init();
 
+	register_blkdev(BLOCK_EXT_MAJOR, "blkext");
+
 #ifndef CONFIG_SYSFS_DEPRECATED
 	/* create top-level block dir */
 	block_depr = kobject_create_and_add("block", NULL);