diff --git a/reference/session/functions/session-id.xml b/reference/session/functions/session-id.xml
index b229e08542..cd35d3b5e1 100644
--- a/reference/session/functions/session-id.xml
+++ b/reference/session/functions/session-id.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.13 $ -->
+<!-- $Revision: 1.14 $ -->
 <refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.session-id">
  <refnamediv>
   <refname>session_id</refname>
@@ -36,7 +36,7 @@
         <function>session_start</function> for that purpose. Depending on the
         session handler, not all characters are allowed within the session id.
         For example, the file session handler only allows characters in the
-        range <literal>a-z, A-Z and 0-9</literal>!
+        range <literal>a-z A-Z 0-9 , (comma) and - (minus)</literal>!
        </para>
        <note>
         <simpara>
@@ -61,6 +61,31 @@
   </para>
  </refsect1>
 
+ <refsect1 role="changelog"><!-- {{{ -->
+  &reftitle.changelog;
+  <para>
+   <informaltable>
+    <tgroup cols="2">
+     <thead>
+      <row>
+       <entry>&Version;</entry>
+       <entry>&Description;</entry>
+      </row>
+     </thead>
+     <tbody>
+      <row>
+       <entry>5.0.0</entry>
+       <entry>
+        The <literal>,</literal> (comma) and <literal>-</literal> (minus)
+        characters are allowed in the file session handler.
+       </entry>
+      </row>
+     </tbody>
+    </tgroup>
+   </informaltable>
+  </para>
+ </refsect1><!-- }}} -->
+
 <refsect1 role="seealso">
   &reftitle.seealso;
   <para>