diff --git a/lib/classes/auth_plugins/StudipAuthSimpleSamlPHP.php b/lib/classes/auth_plugins/StudipAuthSimpleSamlPHP.php
index a95d0cabe660bde654fc741f670bba69fff466ab..439b7c85c3b99e038f655015ab8058b98d76d8b9 100644
--- a/lib/classes/auth_plugins/StudipAuthSimpleSamlPHP.php
+++ b/lib/classes/auth_plugins/StudipAuthSimpleSamlPHP.php
@@ -28,10 +28,10 @@ class StudipAuthSimpleSamlPHP extends StudipAuthSSO
     {
         parent::__construct($config);
 
-        if(!isset($this->path_to_simple_saml_php)){
-            require_once('/var/simplesamlphp/src/_autoload.php');
+        if (empty($this->path_to_simple_saml_php)) {
+            require_once '/var/simplesamlphp/src/_autoload.php';
         }else{
-            require_once($this->path_to_simple_saml_php );
+            require_once $this->path_to_simple_saml_php;
         }
 
         if (!isset($this->plugin_fullname)) {