diff --git a/reference/strings/functions/nl2br.xml b/reference/strings/functions/nl2br.xml
index 21c011ba72..85cffe4169 100644
--- a/reference/strings/functions/nl2br.xml
+++ b/reference/strings/functions/nl2br.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.10 $ -->
+<!-- $Revision: 1.11 $ -->
 <refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.nl2br">
  <refnamediv>
   <refname>nl2br</refname>
@@ -11,7 +11,7 @@
   <methodsynopsis>
    <type>string</type><methodname>nl2br</methodname>
    <methodparam><type>string</type><parameter>string</parameter></methodparam>
-   <methodparam><type>bool</type><parameter>is_xhtml</parameter></methodparam>
+   <methodparam choice="opt"><type>bool</type><parameter>is_xhtml</parameter></methodparam>
   </methodsynopsis>
   <para>
    Returns <parameter>string</parameter> with '&lt;br /&gt;' or 
@@ -105,7 +105,7 @@ This is my HTML document
       <row>
        <entry>5.3.0</entry>
        <entry>
-         Added the <parameter>is_xhtml</parameter> parameter.
+         Added the optional <parameter>is_xhtml</parameter> parameter.
        </entry>
       </row>
       <row>