diff --git a/plugins/Login/Auth.php b/plugins/Login/Auth.php
index f866dfd7d5b1b6467c33b6af2e40b72368c473e1..2de99c6934270564717a0b23c2f0f912eac39de7 100644
--- a/plugins/Login/Auth.php
+++ b/plugins/Login/Auth.php
@@ -11,6 +11,7 @@ namespace Piwik\Plugins\Login;
 use Exception;
 use Piwik\AuthResult;
 use Piwik\Db;
+use Piwik\Piwik;
 use Piwik\Plugins\UsersManager\Model;
 use Piwik\Plugins\UsersManager\UsersManager;
 use Piwik\Session;