diff --git a/product/ERP5Type/Tool/WebServiceTool.py b/product/ERP5Type/Tool/WebServiceTool.py
index 5ef5842aebf42c037ef2d1956c6ec408dd02700a..665a8705903409dee25b8a5f051f6966e9ca0b57 100644
--- a/product/ERP5Type/Tool/WebServiceTool.py
+++ b/product/ERP5Type/Tool/WebServiceTool.py
@@ -87,7 +87,6 @@ class WebServiceTool(BaseTool):
     of any kind of web service (not only ERP5) with many
     different kinds of transport like 'xml-rpc' or 'soap'
     """
-    # XXX: implement connection caching per zope thread
     if transport_kw is None:
       transport_kw = {}
     connection_handler_klass = connection_plugin_registry[transport]