diff --git a/reference/intl/constants.xml b/reference/intl/constants.xml
index b210cbfe81..b69027781a 100755
--- a/reference/intl/constants.xml
+++ b/reference/intl/constants.xml
@@ -1,8 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- $Revision: 1.2 $ -->
-<appendix xml:id="intl.constants" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+<!-- $Revision: 1.3 $ -->
+<appendix xml:id="intl.constants" xmlns="http://docbook.org/ns/docbook"
+ xmlns:xlink="http://www.w3.org/1999/xlink">
  &reftitle.constants;
- &no.constants;
+ <para>
+  <variablelist>
+   <varlistentry>
+    <term>
+     <constant>INTL_MAX_LOCALE_LEN</constant>
+     (<type>integer</type>)
+    </term>
+    <listitem>
+     <simpara>
+      Limit on locale length, set to 64 in PHP code. Locale names longer 
+      than this limit will not be accepted.
+     </simpara>
+    </listitem>
+   </varlistentry>
+  </variablelist>
+ </para>
 </appendix>
 
 <!-- Keep this comment at the end of the file