diff --git a/include/functions.php b/include/functions.php
index 394f540c..c6151225 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -2,6 +2,7 @@
 	define('EXPECTED_CONFIG_VERSION', 25);
 	define('SCHEMA_VERSION', 92);
 
+	mb_internal_encoding("UTF-8");
 	date_default_timezone_set('UTC');
 	if (defined('E_DEPRECATED')) {
 		error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);