diff --git a/functions/session.xml b/functions/session.xml
index 7ce605ba3e..4aaf3a1115 100644
--- a/functions/session.xml
+++ b/functions/session.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.61 $ -->
+<!-- $Revision: 1.62 $ -->
  <reference id="ref.session">
   <title>Session handling functions</title>
   <titleabbrev>Sessions</titleabbrev>
@@ -1024,6 +1024,28 @@ echo "The cache limiter is now set to $cache_limiter<p>";
    </refsect1>
   </refentry>
 
+  <refentry id='function.session-cache-expire'>
+   <refnamediv>
+    <refname>session_cache_expire</refname>
+    <refpurpose>
+     Return the current cache expire. If new_cache_expire is given,
+     the current cache_expire is replaced with new_cache_expire
+    </refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+    <funcsynopsis>
+     <funcprototype>
+      <funcdef>int <function>session_cache_expire</function></funcdef>
+      <paramdef>int <parameter><optional>new_cache_expire</optional></parameter></paramdef>
+     </funcprototype>
+    </funcsynopsis>
+    <para>
+     &warn.undocumented.func;
+    </para>
+   </refsect1>
+  </refentry>
+
   <refentry id="function.session-write-close">
    <refnamediv>
     <refname>session_write_close</refname>