diff --git a/code/SecurityAdmin.php b/code/SecurityAdmin.php
index 516b9818..17aa4ac4 100644
--- a/code/SecurityAdmin.php
+++ b/code/SecurityAdmin.php
@@ -89,6 +89,8 @@ class SecurityAdmin extends LeftAndMain implements PermissionProvider {
 				$actions
 			);
 			
+			$this->extend('updateEditForm', $form);
+			
 			return $form;
 		}
 
@@ -130,6 +132,8 @@ class SecurityAdmin extends LeftAndMain implements PermissionProvider {
 		$permissionField = $form->Fields()->dataFieldByName('Permissions');
 		if($permissionField) $permissionField->setHiddenPermissions(self::$hidden_permissions);
 
+		$this->extend('updateEditForm', $form);
+
 		return $form;
 	}