diff --git a/metadata/tree/tree_b.php b/metadata/tree/tree_b.php
index 03d0c1a..7d5fcc9 100644
--- a/metadata/tree/tree_b.php
+++ b/metadata/tree/tree_b.php
@@ -1,6 +1,6 @@
 <?php
 require_once("../../config.xyz");
-require_once("../include/xmltools.php");
+require_once("../include/xmltools.xyz");
 $treexml='tree.xml';
 require_once("tree.php");
 ?>