diff --git a/appendices/reserved.xml b/appendices/reserved.xml
index b832e3a2b8..224b988f82 100755
--- a/appendices/reserved.xml
+++ b/appendices/reserved.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.26 $ -->
+<!-- $Revision: 1.27 $ -->
 
  <appendix id="reserved">
   <title>List of Reserved Words</title>
@@ -477,6 +477,25 @@
        </listitem>
       </varlistentry>
 
+      <varlistentry>
+       <term>'<varname>REMOTE_HOST</varname>'</term>
+       <listitem>
+        <simpara>
+         The Host name from which the user is viewing the current
+         page.  The reverse dns lookup is based off the 
+         <varname>REMOTE_ADDR</varname> of the user.
+        </simpara>
+        <note>
+         <simpara>
+          Your web server must be configured to create this variable. For
+          example in Apache you'll need <literal>HostnameLookups On</literal>
+          inside <filename>httpd.conf</filename> for it to exist.  See also
+          <function>gethostbyaddr</function>.
+         </simpara>
+        </note>
+       </listitem>
+      </varlistentry>
+
       <varlistentry>
        <term>'<varname>REMOTE_PORT</varname>'</term>
        <listitem>