diff --git a/docs/extensions/guides/main-extension.md b/docs/extensions/guides/main-extension.md
index bad8e448c0..a0e20880bf 100644
--- a/docs/extensions/guides/main-extension.md
+++ b/docs/extensions/guides/main-extension.md
@@ -97,7 +97,19 @@ This page would be defined in your extension's `Renderer.LensExtension` implemen
 
 ### `trayMenus`
 
-`trayMenus` is a subset of Electron's [`MenuItemConstructorOptions`](https://www.electronjs.org/docs/v14-x-y/api/menu-item). Most importantly you can define a `label` and a `click` handler. Other properties are `submenu`, `enabled`, `visible`, `toolTip`, `id` and `type`.
+`trayMenus` is an array of `TrayMenuRegistration` objects. Most importantly you can define a `label` and a `click` handler. Other properties are `submenu`, `enabled`, `toolTip`, `id` and `type`.
+
+``` typescript
+interface TrayMenuRegistration {
+  label?: string;
+  click?: (menuItem: TrayMenuRegistration) => void;
+  id?: string;
+  type?: "normal" | "separator" | "submenu"
+  toolTip?: string;
+  enabled?: boolean;
+  submenu?: TrayMenuRegistration[]
+}
+```
 
 The following example demonstrates how tray menus can be added from extension: