diff --git a/templates/adoc_header.adoc b/templates/adoc_header.adoc
index 815d6cf9a..f21e5734f 100644
--- a/templates/adoc_header.adoc
+++ b/templates/adoc_header.adoc
@@ -30,6 +30,7 @@ ifdef::backend-html5[]
:document-title: $html_title
:document-subtitle: $html_subtitle
:version: $version ($release_date)
+:os: $os_version
$tag_attribute
[cols="55s"]
@@ -39,7 +40,7 @@ $tag_attribute
[cols="^.^1s",width="100%"]
|======
-|+++
+|+++
+++{document-title}+++
+++{document-subtitle}+++
+++{version}+++
+++
|======