diff --git a/internals2/funcs/index.xml b/internals2/funcs/index.xml
index 4a9542dc48..aaeccbd37c 100644
--- a/internals2/funcs/index.xml
+++ b/internals2/funcs/index.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- $Revision$ -->
- <chapter xml:id="internals2.funcs" xmlns="http://docbook.org/ns/docbook">
+ <chapter xml:id="internals2.funcs" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
   <title>Writing functions</title>
   <para>
    One core element of an extension are functions which are exported to the
@@ -308,7 +308,7 @@ PHP_FUNCTION(hello_world)
 
   <para>
    A documentation of all type specifiers and the corresponding additional C
-   types can be found in the file <code>README.PARAMETER_PARSING_API</code>
+   types can be found in the file <link xlink:href="&url.php.src.parameters.readme;">README.PARAMETER_PARSING_API</link>
    which is part of the source distribution. The most important types can be 
    found in the table below.
   </para>