diff --git a/phpBB/install/index.php b/phpBB/install/index.php
index 6320b14947..664ed231ea 100644
--- a/phpBB/install/index.php
+++ b/phpBB/install/index.php
@@ -243,6 +243,7 @@ $sub = $request->variable('sub', '');
 set_error_handler(defined('PHPBB_MSG_HANDLER') ? PHPBB_MSG_HANDLER : 'msg_handler');
 
 $lang_service = new \phpbb\language\language(new \phpbb\language\language_file_loader($phpbb_root_path, $phpEx));
+$lang_service->add_lang($load_lang_files);
 $user = new \phpbb\user($lang_service, '\phpbb\datetime');
 $auth = new \phpbb\auth\auth();