diff --git a/reference/network/functions/openlog.xml b/reference/network/functions/openlog.xml
index 37cb5edbb6..7900f9d547 100644
--- a/reference/network/functions/openlog.xml
+++ b/reference/network/functions/openlog.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.5 $ -->
+<!-- $Revision: 1.6 $ -->
 <!-- splitted from ./en/functions/network.xml, last change in rev 1.2 -->
   <refentry id="function.openlog">
    <refnamediv>
@@ -143,6 +143,12 @@
       </tgroup>
      </table>
     </para>
+    <note>
+     <para>
+      <literal>LOG_USER</literal> is the only valid log type under Windows
+      operating systems
+     </para>
+    </note>
     <para>
      See also <function>define_syslog_variables</function>,
      <function>syslog</function> and