diff --git a/koha-tmpl/intranet-tmpl/prog/en/includes/doc-head-open.inc b/koha-tmpl/intranet-tmpl/prog/en/includes/doc-head-open.inc
index 5340b553c1..23449a55d6 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/includes/doc-head-open.inc
+++ b/koha-tmpl/intranet-tmpl/prog/en/includes/doc-head-open.inc
@@ -1,3 +1,4 @@
 <!DOCTYPE html>
+<!-- TEMPLATE FILE: [% template.name.split('/').last %] -->
 [% IF ( bidi ) %]<html lang="[% lang %]" dir="[% bidi %]">[% ELSE %]<html lang="[% lang %]">[% END %]
 <head>
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/includes/doc-head-open.inc b/koha-tmpl/opac-tmpl/bootstrap/en/includes/doc-head-open.inc
index 683d859836..b288c18ae3 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/includes/doc-head-open.inc
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/includes/doc-head-open.inc
@@ -1,4 +1,5 @@
 <!DOCTYPE html>
+<!-- TEMPLATE FILE: [% template.name.split('/').last %] -->
 [% IF ( bidi ) %]<html lang="[% lang %]" dir="[% bidi %]" class="no-js">[% ELSE %]<html lang="[% lang %]" class="no-js">[% END %]
 <head>
 <title>