diff --git a/public/install.php b/public/install.php
index e32cf7544ab59f97507c9481e309fbd1a90b4dc8..ffbf90f3dfb3d3599f2ee5323d005e98e3c7c669 100644
--- a/public/install.php
+++ b/public/install.php
@@ -15,36 +15,37 @@ if (file_exists($GLOBALS['STUDIP_BASE_PATH'] . '/config/config_local.inc.php')
 
 set_include_path($GLOBALS['STUDIP_BASE_PATH']);
 
-require_once 'composer/autoload.php';
-require_once 'lib/visual.inc.php';
-require_once 'lib/classes/URLHelper.php';
-require_once 'lib/classes/LayoutMessage.interface.php';
-require_once 'lib/classes/MessageBox.class.php';
-require_once 'lib/classes/Request.class.php';
-require_once 'lib/classes/Interactable.class.php';
-require_once 'lib/classes/Button.class.php';
-require_once 'lib/classes/LinkButton.class.php';
-require_once 'lib/classes/StudipInstaller.php';
-require_once 'lib/classes/SystemChecker.php';
-require_once 'lib/classes/Markup.class.php';
-require_once 'lib/exceptions/AccessDeniedException.php';
-require_once 'lib/flexi/Factory.php';
-require_once 'lib/flexi/PhpTemplate.php';
-require_once 'lib/flexi/Template.php';
-require_once 'lib/flexi/TemplateNotFoundException.php';
-require_once 'lib/trails/Controller.php';
-require_once 'lib/trails/Dispatcher.php';
-require_once 'lib/trails/Exception.php';
-require_once 'lib/trails/Flash.php';
-require_once 'lib/trails/Inflector.php';
-require_once 'lib/trails/Response.php';
-require_once 'lib/trails/Exceptions/DoubleRenderError.php';
-require_once 'lib/trails/Exceptions/MissingFile.php';
-require_once 'lib/trails/Exceptions/RoutingError.php';
-require_once 'lib/trails/Exceptions/SessionRequiredException.php';
-require_once 'lib/trails/Exceptions/UnknownAction.php';
-require_once 'lib/trails/Exceptions/UnknownController.php';
-require_once 'vendor/phpass/PasswordHash.php';
+require 'composer/autoload.php';
+require 'lib/visual.inc.php';
+require 'lib/functions.php';
+require 'lib/classes/URLHelper.php';
+require 'lib/classes/LayoutMessage.interface.php';
+require 'lib/classes/MessageBox.class.php';
+require 'lib/classes/Request.class.php';
+require 'lib/classes/Interactable.class.php';
+require 'lib/classes/Button.class.php';
+require 'lib/classes/LinkButton.class.php';
+require 'lib/classes/StudipInstaller.php';
+require 'lib/classes/SystemChecker.php';
+require 'lib/classes/Markup.class.php';
+require 'lib/exceptions/AccessDeniedException.php';
+require 'lib/flexi/Factory.php';
+require 'lib/flexi/Template.php';
+require 'lib/flexi/PhpTemplate.php';
+require 'lib/flexi/TemplateNotFoundException.php';
+require 'lib/trails/Controller.php';
+require 'lib/trails/Dispatcher.php';
+require 'lib/trails/Exception.php';
+require 'lib/trails/Flash.php';
+require 'lib/trails/Inflector.php';
+require 'lib/trails/Response.php';
+require 'lib/trails/Exceptions/DoubleRenderError.php';
+require 'lib/trails/Exceptions/MissingFile.php';
+require 'lib/trails/Exceptions/RoutingError.php';
+require 'lib/trails/Exceptions/SessionRequiredException.php';
+require 'lib/trails/Exceptions/UnknownAction.php';
+require 'lib/trails/Exceptions/UnknownController.php';
+require 'vendor/phpass/PasswordHash.php';
 
 // Mock gettext functions if extension is not available
 if (!function_exists('_')) {