diff --git a/block/genhd.c b/block/genhd.c
index 16ccc0d..85c1505 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1192,6 +1192,7 @@
 			return NULL;
 		}
 		disk->part_tbl->part[0] = &disk->part0;
+		kref_init(&disk->part0.ref);
 
 		disk->minors = minors;
 		rand_initialize_disk(disk);