diff --git a/code/GridFieldExpandableForm.php b/code/GridFieldExpandableForm.php
index 3b778a7..0471f74 100644
--- a/code/GridFieldExpandableForm.php
+++ b/code/GridFieldExpandableForm.php
@@ -43,6 +43,13 @@ public function getHTMLFragments($gridField) {
 
 class GridFieldExpandableForm_ItemRequest extends RequestHandler {
 
+	private static $allowed_actions = array(
+		'edit',
+		'view',
+		'ItemEditForm',
+		'ExpandableForm'
+	);
+
 	static $url_handlers = array(
 		'$Action!' => '$Action',
 		'' => 'edit',