diff --git a/src/Controller/ShortcodableController.php b/src/Controller/ShortcodableController.php
index e2b22f2..795fa49 100644
--- a/src/Controller/ShortcodableController.php
+++ b/src/Controller/ShortcodableController.php
@@ -227,7 +227,7 @@ public function shortcodePlaceHolder($request)
             return;
         }
 
-        if ($id) {
+        if ($id && is_subclass_of($classname, 'DataObject')) {
             $object = $classname::get()->byID($id);
         } else {
             $object = singleton($classname);