diff --git a/htdocs/public/onlinesign/newonlinesign.php b/htdocs/public/onlinesign/newonlinesign.php
index 5e920444c35..5e30b0bc20e 100644
--- a/htdocs/public/onlinesign/newonlinesign.php
+++ b/htdocs/public/onlinesign/newonlinesign.php
@@ -54,7 +54,7 @@ require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';
 require_once DOL_DOCUMENT_ROOT.'/comm/propal/class/propal.class.php';
 
 // Load translation files
-$langs->loadLangs(array("main", "other", "dict", "bills", "companies", "errors", "members", "paybox", "propal"));
+$langs->loadLangs(array("main", "other", "dict", "bills", "companies", "errors", "members", "paybox", "propal", "commercial"));
 
 // Security check
 // No check on module enabled. Done later according to $validpaymentmethod