diff --git a/lib/private/legacy/util.php b/lib/private/legacy/util.php
index f1ed5a1ccf66..5213d718e373 100644
--- a/lib/private/legacy/util.php
+++ b/lib/private/legacy/util.php
@@ -782,6 +782,7 @@ public static function checkServer(\OCP\IConfig $config) {
 				'DOMDocument' => 'dom',
 				'XMLWriter' => 'XMLWriter',
 				'XMLReader' => 'XMLReader',
+				'Collator' => 'intl',
 			],
 			'functions' => [
 				'xml_parser_create' => 'libxml',