diff --git a/appendices/ini.xml b/appendices/ini.xml
index 4df41a8975..778713bffd 100644
--- a/appendices/ini.xml
+++ b/appendices/ini.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.27 $ -->
+<!-- $Revision: 1.28 $ -->
 
 <appendix id="ini">
  <title>&php.ini; directives</title>
@@ -2727,7 +2727,10 @@
        <listitem>
         <para>
          Enable compatibility mode with Zend Engine 1 (PHP 4).  It affects
-         the cloning, casting, and comparing of objects.
+         the cloning, casting, and <link
+         linkend="language.oop5.object-comparison">comparing of objects</link>.
+         In this mode, objects are passed by value instead of reference by
+         default.
         </para>
         <para>
          See also the section titled