diff --git a/docs/authors/inx-overview.rst b/docs/authors/inx-overview.rst
index 81aab7fae0a7c106634f8fbd93a0e24c7e3bfdf2..c65ff7b8a72dbe2749c9603d273780018264a053 100644
--- a/docs/authors/inx-overview.rst
+++ b/docs/authors/inx-overview.rst
@@ -131,6 +131,7 @@ XML Children
     </effects-menu>
 
 - ``<menu-tip>Tooltip</menu-tip>``: Tooltip of the extension.
+- ``<icon>path/to/extension-icon.svg</icon>``: Icon for the extension gallery.
 - ``<object-type>type|all</object-type>``: Specify for which selection of SVG
   elements the extension is enabled and can be triggered from within Inkscape.