diff --git a/htdocs/webservices/server_order.php b/htdocs/webservices/server_order.php
index c84eefa3480..1bc0fa6a60e 100644
--- a/htdocs/webservices/server_order.php
+++ b/htdocs/webservices/server_order.php
@@ -924,8 +924,8 @@ function updateOrder($authentication,$order)
 					{
 						// Define output language
 						$outputlangs = $langs;
-						$order->generateDocument($order->modelpdf, $outputlangs);
-					
+						$object->generateDocument($order->modelpdf, $outputlangs);
+
 					}
 				}
 				if ($order['status'] == 0)  $result=$object->set_reopen($fuser);