diff --git a/htdocs/takepos/invoice.php b/htdocs/takepos/invoice.php
index f5fb80f8735..9c43214ce0b 100644
--- a/htdocs/takepos/invoice.php
+++ b/htdocs/takepos/invoice.php
@@ -49,6 +49,7 @@ if (!defined('INCLUDE_PHONEPAGE_FROM_PUBLIC_PAGE')) {
 require_once DOL_DOCUMENT_ROOT.'/compta/facture/class/facture.class.php';
 require_once DOL_DOCUMENT_ROOT.'/compta/paiement/class/paiement.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/html.form.class.php';
+require_once DOL_DOCUMENT_ROOT.'/core/class/hookmanager.class.php';
 $hookmanager->initHooks(array('takeposinvoice'));
 
 global $mysoc;