diff --git a/src/Controller/AdminController.php b/src/Controller/AdminController.php
index f6baa3b..c4bf00e 100644
--- a/src/Controller/AdminController.php
+++ b/src/Controller/AdminController.php
@@ -381,7 +381,7 @@ public function loadSearchAction(Request $request) {
             if(!empty($config["gridConfig"]["columns"])) {
                 $helperColumns = [];
 
-                foreach ($config["gridConfig"]["columns"] as $column) {
+                foreach ($config["gridConfig"]["columns"] as &$column) {
                     if(!$column["isOperator"]) {
                         $fieldDefinition = $classDefinition->getFieldDefinition($column['key']);
                         if($fieldDefinition) {