diff --git a/htdocs/compta/facture/pre.inc.php b/htdocs/compta/facture/pre.inc.php
index 834d1235cba..cd7112e1a31 100644
--- a/htdocs/compta/facture/pre.inc.php
+++ b/htdocs/compta/facture/pre.inc.php
@@ -1,5 +1,5 @@
 <?PHP
-/* Copyright (C) 2003 Rodolphe Quiedeville <rodolphe@quiedeville.org> 
+/* Copyright (C) 2003-2004 Rodolphe Quiedeville <rodolphe@quiedeville.org> 
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,6 +20,7 @@
  *
  */
 require("../../main.inc.php");
+require("../../facture.class.php");
 
 function llxHeader($head = "", $title="", $help_url='') {
   global $user, $conf;