diff -Naur asciidoc-8.2.5.orig/docbook.conf asciidoc-8.2.5/docbook.conf
--- asciidoc-8.2.5.orig/docbook.conf	2007-10-29 04:50:53.000000000 +0100
+++ asciidoc-8.2.5/docbook.conf	2007-11-23 22:10:46.000000000 +0100
@@ -424,7 +424,7 @@
 
 [header]
 template::[header-declarations]
-<refentry>
+<refentry lang="{lang=en}">
 <refmeta>
 <refentrytitle>{mantitle}</refentrytitle>
 <manvolnum>{manvolnum}</manvolnum>