diff --git a/htdocs/mrp/mo_list.php b/htdocs/mrp/mo_list.php
index 99e91fec184..c3ae9247c9d 100644
--- a/htdocs/mrp/mo_list.php
+++ b/htdocs/mrp/mo_list.php
@@ -27,6 +27,7 @@ require '../main.inc.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/html.formcompany.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/company.lib.php';
+require_once DOL_DOCUMENT_ROOT.'/bom/class/bom.class.php';
 
 // load mrp libraries
 require_once __DIR__.'/class/mo.class.php';