diff --git a/appendices/migration53.xml b/appendices/migration53.xml
index 45a6fa32ae..961daa689f 100644
--- a/appendices/migration53.xml
+++ b/appendices/migration53.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.11 $ -->
+<!-- $Revision: 1.12 $ -->
 <appendix xml:id="migration53" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <title>Migrating from PHP 5.2.x to PHP 5.3.x</title>
  <para>
@@ -1176,6 +1176,12 @@
    Changes in behaviour/new features to extensions:
   </para>
   <itemizedlist>
+   <listitem>
+    <simpara>
+     <link linkend="book.datetime">Date and Time</link>
+     - The TZ environment variable is no longer used to guess the timezone
+    </simpara>
+   </listitem>
    <listitem>
     <simpara>
      <link linkend="book.hash">Hash</link>