diff --git a/htdocs/admin/supplierinvoice_extrafields.php b/htdocs/admin/supplierinvoice_extrafields.php
index ba584bdae8c..40494f9c286 100644
--- a/htdocs/admin/supplierinvoice_extrafields.php
+++ b/htdocs/admin/supplierinvoice_extrafields.php
@@ -38,6 +38,7 @@ if (!$user->admin)
 $langs->load("admin");
 $langs->load("other");
 $langs->load("bills");
+$langs->load("orders");
 $langs->load("suppliers");
 
 $extrafields = new ExtraFields($db);