diff --git a/app/Http/Controllers/ReportActivityMaterialController.php b/app/Http/Controllers/ReportActivityMaterialController.php
index a661e80..a4a120b 100644
--- a/app/Http/Controllers/ReportActivityMaterialController.php
+++ b/app/Http/Controllers/ReportActivityMaterialController.php
@@ -124,7 +124,8 @@ class ReportActivityMaterialController extends Controller
return Datatables::of($data)
->addIndexColumn()
->addColumn('action', function($row){
- $actionBtn = '';
+ $actionBtn = '';
+ $actionBtn .= '';
return $actionBtn;
})
->rawColumns(['action'])->make(true);