diff --git a/openstack/telemetry/v2/statistics.py b/openstack/telemetry/v2/statistics.py
index 88a1613..b8bcdd0 100644
--- a/openstack/telemetry/v2/statistics.py
+++ b/openstack/telemetry/v2/statistics.py
@@ -59,7 +59,7 @@ class Statistics(resource.Resource):
 
     @classmethod
     def list(cls, session, limit=None, marker=None, path_args=None,
-             paginated=False, **params):
+             paginated=False, params=None):
         url = cls._get_url(path_args)
         resp = session.get(url, endpoint_filter=cls.service, params=params)
         for stat in resp.json():
diff --git a/openstack/tests/unit/telemetry/v2/test_statistics.py b/openstack/tests/unit/telemetry/v2/test_statistics.py
index 2717c02..ca84744 100644
--- a/openstack/tests/unit/telemetry/v2/test_statistics.py
+++ b/openstack/tests/unit/telemetry/v2/test_statistics.py
@@ -77,6 +77,6 @@ class TestStatistics(testtools.TestCase):
         url = '/meters/example/statistics'
         stat = next(reply)
         sess.get.assert_called_with(url, endpoint_filter=stat.service,
-                                    params={})
+                                    params=None)
         self.assertEqual(EXAMPLE, stat)
         self.assertRaises(StopIteration, next, reply)