diff --git a/demo/xml/catalog.xml b/demo/xml/catalog.xml
index 2d176fb..3e7fd29 100644
--- a/demo/xml/catalog.xml
+++ b/demo/xml/catalog.xml
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8" ?>
+<?xml-stylesheet type="text/xsl" href="catalog.xsl"?>
 <catalog>
 
   <book>