diff --git a/htdocs/fourn/class/paiementfourn.class.php b/htdocs/fourn/class/paiementfourn.class.php
index e3b7be2c42a..b587922b71d 100644
--- a/htdocs/fourn/class/paiementfourn.class.php
+++ b/htdocs/fourn/class/paiementfourn.class.php
@@ -362,6 +362,7 @@ class PaiementFourn extends Paiement
 								$newlang = '';
 								$outputlangs = $langs;
 								if (getDolGlobalInt('MAIN_MULTILANGS') && empty($newlang)) {
+									$invoice->fetch_thirdparty();
 									$newlang = $invoice->thirdparty->default_lang;
 								}
 								if (!empty($newlang)) {