diff --git a/src/Symfony/Component/HttpKernel/Client.php b/src/Symfony/Component/HttpKernel/Client.php
index fae10988e4..2c61c55dbf 100644
--- a/src/Symfony/Component/HttpKernel/Client.php
+++ b/src/Symfony/Component/HttpKernel/Client.php
@@ -107,7 +107,7 @@ class Client extends BaseClient
         $code = <<<EOF
 <?php
 
-error_reporting($errorReporting | ~E_USER_DEPRECATED);
+error_reporting($errorReporting & ~E_USER_DEPRECATED);
 
 require_once '$requirePath';