diff --git a/block/snapshot.c b/block/snapshot.c
index 660c666d336d925031d1436285161d18677dadac..553ed28605a38ed335e73ad91c05fdbad75a4602 100644
--- a/block/snapshot.c
+++ b/block/snapshot.c
@@ -295,6 +295,7 @@ int bdrv_snapshot_goto(BlockDriverState *bs,
         bdrv_graph_wrunlock(NULL);
 
         ret = bdrv_snapshot_goto(fallback_bs, snapshot_id, errp);
+        memset(bs->opaque, 0, drv->instance_size);	
         memset(bs->opaque, 0, drv->instance_size);
         open_ret = drv->bdrv_open(bs, options, bs->open_flags, &local_err);
         qobject_unref(options);