diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 6f841fb..a2d7298 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1106,6 +1106,8 @@
 	int (*direct_access) (struct block_device *, sector_t,
 						void **, unsigned long *);
 	int (*media_changed) (struct gendisk *);
+	unsigned long long (*set_capacity) (struct gendisk *,
+						unsigned long long);
 	int (*revalidate_disk) (struct gendisk *);
 	int (*getgeo)(struct block_device *, struct hd_geometry *);
 	struct module *owner;