diff --git a/reference/pcre/functions/preg-replace-callback.xml b/reference/pcre/functions/preg-replace-callback.xml
index 3d09929c46..0770c89952 100644
--- a/reference/pcre/functions/preg-replace-callback.xml
+++ b/reference/pcre/functions/preg-replace-callback.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.10 $ -->
+<!-- $Revision: 1.11 $ -->
 <!-- splitted from ./en/functions/pcre.xml, last change in rev 1.47 -->
 <refentry id="function.preg-replace-callback">
  <refnamediv>
@@ -14,6 +14,7 @@
    <methodparam><type>callback</type><parameter>callback</parameter></methodparam>
    <methodparam><type>mixed</type><parameter>subject</parameter></methodparam>
    <methodparam choice="opt"><type>int</type><parameter>limit</parameter></methodparam>
+   <methodparam choice="opt"><type>int</type><parameter role="reference">count</parameter></methodparam>
   </methodsynopsis>
   <para>
    The behavior of this function is almost identical to
@@ -88,6 +89,11 @@ fclose($fp);
 ]]>
    </programlisting>
   </example>
+  <note>
+   <para>
+    <parameter>count</parameter> parameter is available since PHP 5.1.0.
+   </para>
+  </note>
   <para>
    See also <function>preg_replace</function>,
    <function>create_function</function>,