diff --git a/docs/en-US/component/menu.md b/docs/en-US/component/menu.md
index 0fa21b9386..50f2ab0e0e 100644
--- a/docs/en-US/component/menu.md
+++ b/docs/en-US/component/menu.md
@@ -61,6 +61,7 @@ menu/collapse
 | menu-trigger        | how sub-menus are triggered, only works when `mode` is 'horizontal'                                                                                                   | string  | hover / click         | hover    |
 | router              | whether `vue-router` mode is activated. If true, index will be used as 'path' to activate the route action. Use with `default-active` to set the active item on load. | boolean | —                     | false    |
 | collapse-transition | whether to enable the collapse transition                                                                                                                             | boolean | —                     | true     |
+| popper-effect       | Tooltip theme, built-in theme: `dark` / `light` when menu is collapsed                                                                                                | string  | dark / light          | dark     |
 
 ## Menu Methods