diff --git a/lib/Auth/Source/authtfaga.php b/lib/Auth/Source/authtfaga.php
index f73153c..9571ea2 100644
--- a/lib/Auth/Source/authtfaga.php
+++ b/lib/Auth/Source/authtfaga.php
@@ -94,7 +94,7 @@ public function authenticate(&$state)
 
         $id = SimpleSAML_Auth_State::saveState($state, self::STAGEID);
 
-        $url = SimpleSAML_Module::getModuleURL('authtfaga/login.php');
+        $url = SimpleSAML\Module::getModuleURL('authtfaga/login.php');
         SimpleSAML_Utilities::redirect($url, array('AuthState' => $id));
     }