diff --git a/openerp/http.py b/openerp/http.py
index b3b243e4367..e5194b6d4cb 100644
--- a/openerp/http.py
+++ b/openerp/http.py
@@ -504,8 +504,8 @@ class JsonRequest(WebRequest):
 
         # Read POST content or POST Form Data named "request"
         try:
-            self.jsonrequest = simplejson.loads(request)
-        except simplejson.JSONDecodeError:
+            self.jsonrequest = json.loads(request)
+        except ValueError:
             msg = 'Invalid JSON data: %r' % (request,)
             _logger.info('%s: %s', self.httprequest.path, msg)
             raise werkzeug.exceptions.BadRequest(msg)