diff --git a/reference/filesystem/functions/parse-ini-file.xml b/reference/filesystem/functions/parse-ini-file.xml
index a617c8a578..bcac620210 100644
--- a/reference/filesystem/functions/parse-ini-file.xml
+++ b/reference/filesystem/functions/parse-ini-file.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.11 $ -->
+<!-- $Revision: 1.12 $ -->
 <!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.87 -->
   <refentry id="function.parse-ini-file">
    <refnamediv>
@@ -42,6 +42,12 @@
       and <link linkend="ini.open-basedir">open_basedir</link>.
      </simpara>
     </note>
+    <note>
+     <simpara>
+      There are reserved words which must not be used as keys for
+      ini files.  These include: yes, no, true, and false.
+     </simpara>
+    </note>
     <para>
      The structure of the ini file is similar to that of
      the &php.ini;'s.