diff --git a/doc/tutorial2/libxslt_pipes.xml b/doc/tutorial2/libxslt_pipes.xml
index 9a672a9b..2aaac95f 100644
--- a/doc/tutorial2/libxslt_pipes.xml
+++ b/doc/tutorial2/libxslt_pipes.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="iso-8859-2"?>
-<!DOCTYPE article 
-SYSTEM "file:///usr/share/docbook/docbook-xml-4.3/docbookx.dtd">
+<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+               "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
 
 <article id="libxslt">
 <articleinfo>