diff --git a/functions/filesystem.xml b/functions/filesystem.xml
index 935f4e13bc..ddffff2d28 100644
--- a/functions/filesystem.xml
+++ b/functions/filesystem.xml
@@ -1,9 +1,16 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.126 $ -->
+<!-- $Revision: 1.127 $ -->
  <reference id="ref.filesystem">
   <title>Filesystem functions</title>
   <titleabbrev>Filesystem</titleabbrev>
 
+  <partintro>
+   <simpara>
+    For related functions, see also the <link linkend="ref.dir">Directory</link>
+    and <link linkend="ref.exec">Program Execution</link> sections.
+   </simpara>
+  </partintro>
+ 
   <refentry id="function.basename">
    <refnamediv>
     <refname>basename</refname>