diff --git a/phpBB/style.php b/phpBB/style.php
index eaab4544bc..36faa6d98d 100644
--- a/phpBB/style.php
+++ b/phpBB/style.php
@@ -49,6 +49,7 @@ if ($id)
 	require($phpbb_root_path . 'includes/db/' . $dbms . '.' . $phpEx);
 	require($phpbb_root_path . 'includes/constants.' . $phpEx);
 	require($phpbb_root_path . 'includes/functions.' . $phpEx);
+	require($phpbb_root_path . 'includes/utf/utf_tools.' . $phpEx);
 
 	$class_loader = new phpbb_class_loader($phpbb_root_path, '.' . $phpEx);
 	$class_loader->register();