diff --git a/code/LeftAndMain.php b/code/LeftAndMain.php
index c1af92a19..64e28364c 100644
--- a/code/LeftAndMain.php
+++ b/code/LeftAndMain.php
@@ -115,6 +115,11 @@ class LeftAndMain extends Controller implements PermissionProvider
      */
     private static $url_priority = 50;
 
+    /**
+     * When set to true, this controller isn't given a menu item in the left panel in the CMS.
+     */
+    private static bool $ignore_menuitem = false;
+
     /**
      * A subclass of {@link DataObject}.
      *