diff --git a/app/Http/Controllers/InvoiceController.php b/app/Http/Controllers/InvoiceController.php
index b073e20d..9f94ee0a 100644
--- a/app/Http/Controllers/InvoiceController.php
+++ b/app/Http/Controllers/InvoiceController.php
@@ -361,7 +361,7 @@ class InvoiceController extends Controller
             }
             foreach ($bookings as $id) {
                 $do = $this->generateSupplierDo($id);
-                $zip->addFromString('do_'.Carbon::today()->format('Y_m_d').'_'.$id, $do->Output('do.pdf', 'S'));
+                $zip->addFromString('do_'.Carbon::today()->format('Y_m_d').'_'.$id.'.pdf', $do->Output('do.pdf', 'S'));
             }
 
             $zip->close();