diff --git a/include/geoip.inc b/include/geoip.inc
index 0facf14fd..413b32297 100644
--- a/include/geoip.inc
+++ b/include/geoip.inc
@@ -1,4 +1,7 @@
-<?php
+<?php // -*- C++ -*-
+
+// $Id$
+
 /* 
    This PHP version of the GeoIP library was written in May 2002
    by Jim Winstead <jimw@apache.org>
diff --git a/include/langchooser.inc b/include/langchooser.inc
index 1e0eb4288..a1cde10d2 100644
--- a/include/langchooser.inc
+++ b/include/langchooser.inc
@@ -1,4 +1,6 @@
-<?php
+<?php // -*- C++ -*-
+
+// $Id$
 
 /*
 
diff --git a/include/languages.inc b/include/languages.inc
index 1d899da3b..30437cce6 100644
--- a/include/languages.inc
+++ b/include/languages.inc
@@ -1,4 +1,6 @@
-<?php
+<?php // -*- C++ -*-
+
+// $Id$
 
 /*
  This is a list of all manual languages hosted
diff --git a/include/manual-lookup.inc b/include/manual-lookup.inc
index ccfc8ec05..0bce74020 100644
--- a/include/manual-lookup.inc
+++ b/include/manual-lookup.inc
@@ -1,5 +1,7 @@
 <?php // -*- C++ -*-
 
+// $Id$
+
 // Try to find some variations of keyword with $prefix in the $lang manual
 function tryprefix($lang, $keyword, $prefix)
 {
diff --git a/include/prepend.inc b/include/prepend.inc
index abd26bfdd..9fcb75e21 100644
--- a/include/prepend.inc
+++ b/include/prepend.inc
@@ -1,5 +1,7 @@
 <?php // -*- C++ -*-
 
+// $Id$
+
 // See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9
 // for cache control header descriptions (used in many places on the site).
 
diff --git a/include/site.inc b/include/site.inc
index 710e23447..883a51809 100644
--- a/include/site.inc
+++ b/include/site.inc
@@ -1,4 +1,6 @@
-<?php
+<?php // -*- C++ -*-
+
+// $Id$
 
 // Define $MIRRORS array, and some constants
 include_once 'mirrors.inc';