diff --git a/Controller/UserController.php b/Controller/UserController.php
index 7b2b013e6..83465366a 100644
--- a/Controller/UserController.php
+++ b/Controller/UserController.php
@@ -210,7 +210,7 @@ class UserController extends Controller
         try {
             $user->removeGroupCenter($groupCenter);
         } catch (\RuntimeException $ex) {
-            $this->addFlash('error', $this->get('translator')->trans($ex-getMessage()));
+            $this->addFlash('error', $this->get('translator')->trans($ex->getMessage()));
 
             return $this->redirect($this->generateUrl('admin_user_edit', array('id' => $uid)));
         }