diff --git a/reference/strings/functions/strripos.xml b/reference/strings/functions/strripos.xml
index 262aa59049..9b4c4b7e1e 100644
--- a/reference/strings/functions/strripos.xml
+++ b/reference/strings/functions/strripos.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.5 $ -->
+<!-- $Revision: 1.6 $ -->
   <refentry id="function.strripos">
    <refnamediv>
     <refname>strripos</refname>
@@ -65,9 +65,14 @@ if ($pos === false) {
      </example>
     </para>
     <simpara>
-     <parameter>offset</parameter> may be specified to begin searching an 
-     arbitrary number of characters into the string.  Negative values will 
-     stop searching at an arbitrary point prior to the end of the string.
+     The <parameter>offset</parameter> parameter may be specified to begin
+     searching an arbitrary number of characters into the string.
+    </simpara>
+    <simpara>
+     Negative offset values mean the end of string is moved to the left by the
+     specified value plus one. For example,
+     <literal>strripos('abcdef', 'b', -4)</literal> will search the string
+     <literal>abc</literal> for <literal>b</literal>.
     </simpara>
     <para>
      See also <function>strrpos</function>,