diff --git a/reference/geoip/functions/geoip-country-code-by-name.xml b/reference/geoip/functions/geoip-country-code-by-name.xml
index 1209325280..1b23707130 100644
--- a/reference/geoip/functions/geoip-country-code-by-name.xml
+++ b/reference/geoip/functions/geoip-country-code-by-name.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<refentry xml:id="function.geoip-country-code-by-name" xmlns="http://docbook.org/ns/docbook">
+<refentry xml:id="function.geoip-country-code-by-name" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>geoip_country_code_by_name</refname>
   <refpurpose>Get the two letter country code</refpurpose>
@@ -73,7 +73,9 @@ This host is located in: US
   &reftitle.notes;
   <caution>
    <para>
-    Please see <link>http://www.maxmind.com/en/iso3166</link> for a complete list of possible return values, including special codes.
+    Please see
+    <link xlink:href="&url.maxmind.iso3166;">&url.maxmind.iso3166;</link> for
+    a complete list of possible return values, including special codes.
    </para>
   </caution>
  </refsect1>