diff --git a/README.md b/README.md
index f8e22761..06090329 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ Name | Description | Values | Default
 :--- | :--- | :--- | :---
 `$wgCitizenThemeDefault` | The default theme of the skin | `auto` - switch between light and dark according to OS/browser settings; `light`; `dark` | `auto`
 `$wgCitizenShowPageTools` | The condition of page tools visibility | `true` - always visible; `login` - visible to logged-in users; `permission` - visible to users with the right permissions | `true`
+`$wgCitizenPortalAttach` | Label of the portal to attach links to upload and special pages to | string | `first`
 `$wgCitizenThemeColor` | The color defined in the `theme-color` meta tag | Hex color code | `#11151d`
 
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