diff --git a/htdocs/webservices/server_invoice.php b/htdocs/webservices/server_invoice.php
index 47c1b42e63b..4e8d3ec41d8 100644
--- a/htdocs/webservices/server_invoice.php
+++ b/htdocs/webservices/server_invoice.php
@@ -428,7 +428,7 @@ function getInvoicesForThirdParty($authentication,$idthirdparty)
 
 		$sql ='SELECT f.rowid as facid, ref as ref, ref_ext, type, fk_statut as status, total_ttc, total, tva';
 		$sql.=' FROM '.MAIN_DB_PREFIX.'facture as f';
-		$sql.=" WHERE f.entity = ".$conf->entity;
+		$sql.=" WHERE f.entity IN (".getEntity('invoice').")";
 		if ($idthirdparty != 'all' ) $sql.=" AND f.fk_soc = ".$db->escape($idthirdparty);
 
 		$resql=$db->query($sql);