diff --git a/lib/private/legacy/util.php b/lib/private/legacy/util.php
index 5cc83c0c304eb..ebac912a158ea 100644
--- a/lib/private/legacy/util.php
+++ b/lib/private/legacy/util.php
@@ -822,7 +822,7 @@ public static function checkServer(\OC\SystemConfig $config) {
 			),
 			'functions' => [
 				'xml_parser_create' => 'libxml',
-				'mb_strcut' => 'mb multibyte',
+				'mb_strcut' => 'mbstring',
 				'ctype_digit' => 'ctype',
 				'json_encode' => 'JSON',
 				'gd_info' => 'GD',