diff --git a/openstack/resource.py b/openstack/resource.py
index d652b4d8..7e43f156 100644
--- a/openstack/resource.py
+++ b/openstack/resource.py
@@ -214,9 +214,10 @@ class Resource(collections.MutableMapping):
 
         if r_id:
             url = utils.urljoin(cls.base_path, r_id)
-            resp = session.put(cls.service, url, json=body).body
+            resp = session.put(url, service=cls.service, json=body).body
         else:
-            resp = session.post(cls.service, cls.base_path, json=body).body
+            resp = session.post(cls.base_path, service=cls.service,
+                                json=body).body
 
         if cls.resource_key:
             resp = resp[cls.resource_key]
@@ -234,7 +235,7 @@ class Resource(collections.MutableMapping):
             raise MethodNotSupported('retrieve')
 
         url = utils.urljoin(cls.base_path, r_id)
-        body = session.get(cls.service, url).body
+        body = session.get(url, service=cls.service).body
 
         if cls.resource_key:
             body = body[cls.resource_key]
@@ -262,7 +263,7 @@ class Resource(collections.MutableMapping):
             body = attrs
 
         url = utils.urljoin(cls.base_path, r_id)
-        resp = session.patch(cls.service, url, json=body).body
+        resp = session.patch(url, service=cls.service, json=body).body
 
         if cls.resource_key:
             resp = resp[cls.resource_key]
@@ -290,7 +291,7 @@ class Resource(collections.MutableMapping):
         if not cls.allow_delete:
             raise MethodNotSupported('delete')
 
-        session.delete(cls.service, utils.urljoin(cls.base_path, r_id),
+        session.delete(utils.urljoin(cls.base_path, r_id), service=cls.service,
                        accept=None)
 
     def delete(self, session):
@@ -314,7 +315,7 @@ class Resource(collections.MutableMapping):
         if filters:
             url = '%s?%s' % (url, url_parse.urlencode(filters))
 
-        resp = session.get(cls.service, url).body
+        resp = session.get(url, service=cls.service).body
 
         if cls.resources_key:
             resp = resp[cls.resources_key]
diff --git a/openstack/session.py b/openstack/session.py
index ed1cd547..9634e474 100644
--- a/openstack/session.py
+++ b/openstack/session.py
@@ -32,16 +32,17 @@ class Session(object):
         self.transport = transport
         self.authenticator = authenticator
 
-    def _request(self, service, path, method, authenticate=True, **kwargs):
+    def _request(self, path, method, service=None, authenticate=True,
+                 **kwargs):
         """Send an HTTP request with the specified characteristics.
 
         Handle a session level request.
 
-        :param ServiceFilter service: Object that identifies service to
-                                          the authenticator.
-        :type service: :class:`openstack.auth.service_filter.ServiceFilter`
         :param string path: Path relative to authentictor base url.
         :param string method: The http method to use. (eg. 'GET', 'POST').
+        :param ServiceFilter service: Object that filters service to
+                                      the authenticator.
+        :type service: :class:`openstack.auth.service_filter.ServiceFilter`
         :param bool authenticate: True if a token should be attached
         :param kwargs: any other parameter that can be passed to transport
                        and authenticator.
@@ -60,20 +61,20 @@ class Session(object):
 
         return self.transport.request(method, url, **kwargs)
 
-    def head(self, service, path, **kwargs):
-        return self._request(service, path, 'HEAD', **kwargs)
+    def head(self, path, **kwargs):
+        return self._request(path, 'HEAD', **kwargs)
 
-    def get(self, service, path, **kwargs):
-        return self._request(service, path, 'GET', **kwargs)
+    def get(self, path, **kwargs):
+        return self._request(path, 'GET', **kwargs)
 
-    def post(self, service, path, **kwargs):
-        return self._request(service, path, 'POST', **kwargs)
+    def post(self, path, **kwargs):
+        return self._request(path, 'POST', **kwargs)
 
-    def put(self, service, path, **kwargs):
-        return self._request(service, path, 'PUT', **kwargs)
+    def put(self, path, **kwargs):
+        return self._request(path, 'PUT', **kwargs)
 
-    def delete(self, service, path, **kwargs):
-        return self._request(service, path, 'DELETE', **kwargs)
+    def delete(self, path, **kwargs):
+        return self._request(path, 'DELETE', **kwargs)
 
-    def patch(self, service, path, **kwargs):
-        return self._request(service, path, 'PATCH', **kwargs)
+    def patch(self, path, **kwargs):
+        return self._request(path, 'PATCH', **kwargs)
diff --git a/openstack/tests/test_session.py b/openstack/tests/test_session.py
index b3250440..bd223d23 100644
--- a/openstack/tests/test_session.py
+++ b/openstack/tests/test_session.py
@@ -29,7 +29,7 @@ class TestSession(base.TestCase):
         self.expected = {'headers': {'X-Auth-Token': self.auth.TOKEN}}
 
     def test_head(self):
-        resp = self.sess.head(self.serv, self.TEST_PATH)
+        resp = self.sess.head(self.TEST_PATH, service=self.serv)
 
         self.assertEqual(self.xport.RESPONSE, resp)
         self.auth.get_token.assert_called_with(self.xport)
@@ -38,7 +38,7 @@ class TestSession(base.TestCase):
         self.xport.request.assert_called_with('HEAD', url, **self.expected)
 
     def test_get(self):
-        resp = self.sess.get(self.serv, self.TEST_PATH)
+        resp = self.sess.get(self.TEST_PATH, service=self.serv)
 
         self.assertEqual(self.xport.RESPONSE, resp)
         self.auth.get_token.assert_called_with(self.xport)
@@ -47,7 +47,7 @@ class TestSession(base.TestCase):
         self.xport.request.assert_called_with('GET', url, **self.expected)
 
     def test_post(self):
-        resp = self.sess.post(self.serv, self.TEST_PATH)
+        resp = self.sess.post(self.TEST_PATH, service=self.serv)
 
         self.assertEqual(self.xport.RESPONSE, resp)
         self.auth.get_token.assert_called_with(self.xport)
@@ -56,7 +56,7 @@ class TestSession(base.TestCase):
         self.xport.request.assert_called_with('POST', url, **self.expected)
 
     def test_put(self):
-        resp = self.sess.put(self.serv, self.TEST_PATH)
+        resp = self.sess.put(self.TEST_PATH, service=self.serv)
 
         self.assertEqual(self.xport.RESPONSE, resp)
         self.auth.get_token.assert_called_with(self.xport)
@@ -65,7 +65,7 @@ class TestSession(base.TestCase):
         self.xport.request.assert_called_with('PUT', url, **self.expected)
 
     def test_delete(self):
-        resp = self.sess.delete(self.serv, self.TEST_PATH)
+        resp = self.sess.delete(self.TEST_PATH, service=self.serv)
 
         self.assertEqual(self.xport.RESPONSE, resp)
         self.auth.get_token.assert_called_with(self.xport)
@@ -74,7 +74,7 @@ class TestSession(base.TestCase):
         self.xport.request.assert_called_with('DELETE', url, **self.expected)
 
     def test_patch(self):
-        resp = self.sess.patch(self.serv, self.TEST_PATH)
+        resp = self.sess.patch(self.TEST_PATH, service=self.serv)
 
         self.assertEqual(self.xport.RESPONSE, resp)
         self.auth.get_token.assert_called_with(self.xport)