diff --git a/addons/website/models/ir_http.py b/addons/website/models/ir_http.py
index 57e7d284922ee5a6e58952a875b4214c40833450..360b34c877c5ff74a2548d64783dc995a51b1f36 100644
--- a/addons/website/models/ir_http.py
+++ b/addons/website/models/ir_http.py
@@ -72,7 +72,7 @@ class ir_http(orm.AbstractModel):
                     if request.lang == request.website.default_lang_code:
                         # If language is in the url and it is the default language, redirect
                         # to url without language so google doesn't see duplicate content
-                        return request.redirect(path + request.httprequest.query_string)
+                        return request.redirect(path + '?' + request.httprequest.query_string)
                     return self.reroute(path)
                 return self._handle_exception(code=404)
         return super(ir_http, self)._dispatch()