--- src/lshw.sgml	2016-04-22 21:49:30.000000000 +0200
+++ src/lshw.sgml	2016-05-07 05:54:39.106562357 +0200
@@ -1,4 +1,4 @@
-<!DOCTYPE RefEntry PUBLIC "-//OASIS//DTD DocBook V4.1//EN">
+<!DOCTYPE RefEntry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <refentry id="lshw">
 
 <refmeta>
