diff --git a/src/Bundle/ChillMainBundle/Form/Type/Export/PickCenterType.php b/src/Bundle/ChillMainBundle/Form/Type/Export/PickCenterType.php
index 1c6c01f72..9c36d452f 100644
--- a/src/Bundle/ChillMainBundle/Form/Type/Export/PickCenterType.php
+++ b/src/Bundle/ChillMainBundle/Form/Type/Export/PickCenterType.php
@@ -80,7 +80,7 @@ class PickCenterType extends AbstractType
         $export = $this->exportManager->getExport($options['export_alias']);
         $centers = $this->authorizationHelper->getReachableCenters(
             $this->user,
-            $export->requiredRole()->__toString()
+            (string) $export->requiredRole()
         );
 
         $builder->add(self::CENTERS_IDENTIFIERS, EntityType::class, [