diff --git a/odoo/http.py b/odoo/http.py
index e444d5c49c0..86d8028f0da 100644
--- a/odoo/http.py
+++ b/odoo/http.py
@@ -619,7 +619,7 @@ class JsonRequest(WebRequest):
             # If we use jsonp, that's mean we are called from another host
             # Some browser (IE and Safari) do no allow third party cookies
             # We need then to manage http sessions manually.
-            response['session_id'] = self.session_id
+            response['session_id'] = self.session.sid
             mime = 'application/javascript'
             body = "%s(%s);" % (self.jsonp, json.dumps(response),)
         else: