diff --git a/include/block/block-global-state.h b/include/block/block-global-state.h
index eec92a98da..706a2cde36 100644
--- a/include/block/block-global-state.h
+++ b/include/block/block-global-state.h
@@ -74,8 +74,8 @@ int bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top,
 int GRAPH_WRLOCK
 bdrv_replace_node(BlockDriverState *from, BlockDriverState *to, Error **errp);
 
-int bdrv_replace_child_bs(BdrvChild *child, BlockDriverState *new_bs,
-                          Error **errp);
+int GRAPH_UNLOCKED
+bdrv_replace_child_bs(BdrvChild *child, BlockDriverState *new_bs, Error **errp);
 BlockDriverState *bdrv_insert_node(BlockDriverState *bs, QDict *node_options,
                                    int flags, Error **errp);
 int bdrv_drop_filter(BlockDriverState *bs, Error **errp);