diff --git a/ceilometer/publisher/http.py b/ceilometer/publisher/http.py
index 3e637e6786..e5d3bec2e7 100644
--- a/ceilometer/publisher/http.py
+++ b/ceilometer/publisher/http.py
@@ -140,7 +140,7 @@ class HttpPublisher(publisher.ConfigPublisherBase):
             scheme,
             netloc,
             parsed_url.path,
-            urlparse.urlencode(params),
+            urlparse.urlencode(params, doseq=True),
             parsed_url.fragment])
 
         self.session.mount(self.target, adapters.HTTPAdapter(**kwargs))