diff --git a/reference/intl/collator/create.xml b/reference/intl/collator/create.xml
index 627b60054c..e4e034d3b3 100644
--- a/reference/intl/collator/create.xml
+++ b/reference/intl/collator/create.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
-<refentry xml:id="collator.create" xmlns="http://docbook.org/ns/docbook">
+<refentry xml:id="collator.create" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>Collator::create</refname>
   <refname>collator_create</refname>