diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 1515112..43e3eb0 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -62,7 +62,7 @@ final class BackendController extends Controller
             ->limit(25)
             ->paginate(
                 'id',
-                $request->getDataString('ptype') ?? '',
+                $request->getDataString('ptype'),
                 $request->getDataInt('offset')
             )->executeGetArray();