diff --git a/code/ReportAdmin.php b/code/ReportAdmin.php
index 0037e7ed..87dc981b 100644
--- a/code/ReportAdmin.php
+++ b/code/ReportAdmin.php
@@ -44,7 +44,7 @@ class ReportAdmin extends LeftAndMain implements PermissionProvider
 
     private static $template_path = null; // defaults to (project)/templates/email
 
-    private static $tree_class = Report::class;
+    private static $model_class = Report::class;
 
     private static $url_handlers = array(
         'show/$ReportClass/$Action' => 'handleAction'