diff --git a/htdocs/webservices/server_supplier_invoice.php b/htdocs/webservices/server_supplier_invoice.php
index ea162ef2a8b..fcfd73270aa 100644
--- a/htdocs/webservices/server_supplier_invoice.php
+++ b/htdocs/webservices/server_supplier_invoice.php
@@ -139,7 +139,8 @@ $server->wsdl->addComplexType(
         'date_modification' => array('name'=>'date_modification','type'=>'xsd:dateTime'),
         'date_invoice' => array('name'=>'date_invoice','type'=>'xsd:date'),
         'date_term' => array('name'=>'date_modification','type'=>'xsd:date'),
-        'type' => array('name'=>'type','type'=>'xsd:int'),
+    	'label' => array('name'=>'label','type'=>'xsd:date'),
+    	'type' => array('name'=>'type','type'=>'xsd:int'),
         'total_net' => array('name'=>'type','type'=>'xsd:double'),
         'total_vat' => array('name'=>'type','type'=>'xsd:double'),
         'total' => array('name'=>'type','type'=>'xsd:double'),