diff --git a/ext/libxml/tests/bug69753.phpt b/ext/libxml/tests/bug69753.phpt
index 6fbe1f85d3b..63d1295b6ed 100644
--- a/ext/libxml/tests/bug69753.phpt
+++ b/ext/libxml/tests/bug69753.phpt
@@ -11,7 +11,7 @@ if (!extension_loaded('dom')) die('skip dom extension not available');
 <?php
 libxml_use_internal_errors(true);
 $doc = new DomDocument();
-$doc->load(__DIR__ . '/bug69753.xml');
+$doc->load(__DIR__ . DIRECTORY_SEPARATOR . 'bug69753.xml');
 $error = libxml_get_last_error();
 var_dump($error->file);
 ?>