diff --git a/reference/datetime/functions/strftime.xml b/reference/datetime/functions/strftime.xml
index 1070269c86..503d0f7bac 100644
--- a/reference/datetime/functions/strftime.xml
+++ b/reference/datetime/functions/strftime.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.22 $ -->
+<!-- $Revision: 1.23 $ -->
 <refentry xml:id="function.strftime" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>strftime</refname>
@@ -238,7 +238,8 @@
         </listitem>
         <listitem>
          <simpara>
-          %Z or %z - time zone or name or abbreviation
+          %Z or %z - time zone offset or name or abbreviation (Operating
+          System dependent)
          </simpara>
         </listitem>
         <listitem>