diff --git a/LDP/howto/docbook/Package-Management-Basics-HOWTO/Package-Management-Basics-HOWTO.xml b/LDP/howto/docbook/Package-Management-Basics-HOWTO/Package-Management-Basics-HOWTO.xml
index 5a6bd455..128be9b3 100644
--- a/LDP/howto/docbook/Package-Management-Basics-HOWTO/Package-Management-Basics-HOWTO.xml
+++ b/LDP/howto/docbook/Package-Management-Basics-HOWTO/Package-Management-Basics-HOWTO.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!-- XML file was created by LyX 2.1.4
   See http://www.lyx.org/ for more information -->