diff --git a/LDP/guide/docbook/Mobile-Guide/Mobile-Guide.xml b/LDP/guide/docbook/Mobile-Guide/Mobile-Guide.xml
index b03f8e24..778c1023 100644
--- a/LDP/guide/docbook/Mobile-Guide/Mobile-Guide.xml
+++ b/LDP/guide/docbook/Mobile-Guide/Mobile-Guide.xml
@@ -27,7 +27,7 @@
 
 ]>
 
-<book lang="en-GB">
+<book>
 
 <bookinfo>
 <title>Linux on the Road</title>