diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 9c3a1db49ac4044300a43574a6e12f3f732cf7b9..a6bbda2e5eb86bee3c7dd19abc6b1516ba1018d7 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1746,6 +1746,7 @@ static int __rbd_refresh_header(struct rbd_device *rbd_dev)
 	kfree(rbd_dev->header.snap_names);
 	kfree(rbd_dev->header.snapc);
 
+	rbd_dev->header.image_size = h.image_size;
 	rbd_dev->header.total_snaps = h.total_snaps;
 	rbd_dev->header.snapc = h.snapc;
 	rbd_dev->header.snap_names = h.snap_names;