diff --git a/addons/web/controllers/main.py b/addons/web/controllers/main.py
index bd9f06625bd..d1feb19e3d1 100644
--- a/addons/web/controllers/main.py
+++ b/addons/web/controllers/main.py
@@ -1209,8 +1209,8 @@ class DataSet(openerpweb.Controller):
     def call_button(self, req, model, method, args, domain_id=None, context_id=None):
         action = self.call_common(req, model, method, args, domain_id, context_id)
         if isinstance(action, dict) and action.get('type') != '':
-            return {'result': clean_action(req, action)}
-        return {'result': False}
+            return clean_action(req, action)
+        return False
 
     @openerpweb.jsonrequest
     def exec_workflow(self, req, model, id, signal):