diff --git a/reference/filesystem/functions/fnmatch.xml b/reference/filesystem/functions/fnmatch.xml
index 214acb3413..54c55258bb 100644
--- a/reference/filesystem/functions/fnmatch.xml
+++ b/reference/filesystem/functions/fnmatch.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.6 $ -->
+<!-- $Revision: 1.7 $ -->
   <refentry id="function.fnmatch">
    <refnamediv>
     <refname>fnmatch</refname> 
@@ -39,6 +39,12 @@ if (fnmatch("*gr[ae]y", $color)) {
 ]]>
      </programlisting>
     </example>
+    <warning>
+     <para>
+      For now this function is not available on Windows or other non-POSIX
+      compliant systems.
+     </para>
+    </warning>
     <para>
      See also <function>glob</function>,
      <function>ereg</function>,