diff --git a/htdocs/webservices/server_thirdparty.php b/htdocs/webservices/server_thirdparty.php
index 7c97159d0bb..a4f7e21221d 100644
--- a/htdocs/webservices/server_thirdparty.php
+++ b/htdocs/webservices/server_thirdparty.php
@@ -329,8 +329,9 @@ function getThirdParty($authentication, $id = '', $ref = '', $ref_ext = '')
 						'supplier_code' => $thirdparty->code_fournisseur,
 						'customer_code_accountancy' => $thirdparty->code_compta,
 						'supplier_code_accountancy' => $thirdparty->code_compta_fournisseur,
-						'fk_user_author' => $thirdparty->fk_user_author,
+						'user_creation' => $thirdparty->fk_user_creat,
 						'date_creation' => dol_print_date($thirdparty->date_creation, 'dayhourrfc'),
+						'user_modification' => $thirdparty->fk_user_modif,
 						'date_modification' => dol_print_date($thirdparty->date_modification, 'dayhourrfc'),
 						'address' => $thirdparty->address,
 						'zip' => $thirdparty->zip,