diff --git a/htdocs/bom/bom_document.php b/htdocs/bom/bom_document.php
index b13277cd82b..ff8887bb4e8 100644
--- a/htdocs/bom/bom_document.php
+++ b/htdocs/bom/bom_document.php
@@ -1,6 +1,6 @@
 <?php
-/* Copyright (C) 2007-2017 Laurent Destailleur  <eldy@users.sourceforge.net>
- * Copyright (C) ---Put here your own copyright and developer email---
+/* Copyright (C) 2007-2017  Laurent Destailleur     <eldy@users.sourceforge.net>
+ * Copyright (C) 2019       Frédéric France         <frederic.france@netlogic.fr>
  *
  * 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
@@ -23,26 +23,13 @@
  */
 
 // Load Dolibarr environment
-$res=0;
-// Try main.inc.php into web root known defined into CONTEXT_DOCUMENT_ROOT (not always defined)
-if (! $res && ! empty($_SERVER["CONTEXT_DOCUMENT_ROOT"])) $res=@include $_SERVER["CONTEXT_DOCUMENT_ROOT"]."/main.inc.php";
-// Try main.inc.php into web root detected using web root calculated from SCRIPT_FILENAME
-$tmp=empty($_SERVER['SCRIPT_FILENAME'])?'':$_SERVER['SCRIPT_FILENAME'];$tmp2=realpath(__FILE__); $i=strlen($tmp)-1; $j=strlen($tmp2)-1;
-while($i > 0 && $j > 0 && isset($tmp[$i]) && isset($tmp2[$j]) && $tmp[$i]==$tmp2[$j]) { $i--; $j--; }
-if (! $res && $i > 0 && file_exists(substr($tmp, 0, ($i+1))."/main.inc.php")) $res=@include substr($tmp, 0, ($i+1))."/main.inc.php";
-if (! $res && $i > 0 && file_exists(dirname(substr($tmp, 0, ($i+1)))."/main.inc.php")) $res=@include dirname(substr($tmp, 0, ($i+1)))."/main.inc.php";
-// Try main.inc.php using relative path
-if (! $res && file_exists("../main.inc.php")) $res=@include "../main.inc.php";
-if (! $res && file_exists("../../main.inc.php")) $res=@include "../../main.inc.php";
-if (! $res && file_exists("../../../main.inc.php")) $res=@include "../../../main.inc.php";
-if (! $res) die("Include of main fails");
-
+require '../main.inc.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/company.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/images.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/html.formfile.class.php';
-dol_include_once('/bom/class/bom.class.php');
-dol_include_once('/bom/lib/bom_bom.lib.php');
+require_once DOL_DOCUMENT_ROOT.'/bom/class/bom.class.php';
+require_once DOL_DOCUMENT_ROOT.'/bom/lib/bom_bom.lib.php';
 
 // Load translation files required by the page
 $langs->loadLangs(array("mrp","companies","other","mails"));