diff --git a/os_client_config/cloud_config.py b/os_client_config/cloud_config.py
index 3f46c6e..32fd3b6 100644
--- a/os_client_config/cloud_config.py
+++ b/os_client_config/cloud_config.py
@@ -23,6 +23,14 @@ from os_client_config import _log
 from os_client_config import exceptions
 
 
+def _make_key(key, service_type):
+    if not service_type:
+        return key
+    else:
+        service_type = service_type.lower().replace('-', '_')
+        return "_".join([service_type, key])
+
+
 class CloudConfig(object):
     def __init__(self, name, region, config,
                  force_ipv4=False, auth_plugin=None,
@@ -89,32 +97,30 @@ class CloudConfig(object):
         return self.config['auth']
 
     def get_interface(self, service_type=None):
+        key = _make_key('interface', service_type)
         interface = self.config.get('interface')
-        if not service_type:
-            return interface
-        key = '{service_type}_interface'.format(service_type=service_type)
         return self.config.get(key, interface)
 
     def get_region_name(self, service_type=None):
         if not service_type:
             return self.region
-        key = '{service_type}_region_name'.format(service_type=service_type)
+        key = _make_key('region_name', service_type)
         return self.config.get(key, self.region)
 
     def get_api_version(self, service_type):
-        key = '{service_type}_api_version'.format(service_type=service_type)
+        key = _make_key('api_version', service_type)
         return self.config.get(key, None)
 
     def get_service_type(self, service_type):
-        key = '{service_type}_service_type'.format(service_type=service_type)
+        key = _make_key('service_type', service_type)
         return self.config.get(key, service_type)
 
     def get_service_name(self, service_type):
-        key = '{service_type}_service_name'.format(service_type=service_type)
+        key = _make_key('service_name', service_type)
         return self.config.get(key, None)
 
     def get_endpoint(self, service_type):
-        key = '{service_type}_endpoint'.format(service_type=service_type)
+        key = _make_key('endpoint', service_type)
         return self.config.get(key, None)
 
     @property
diff --git a/os_client_config/tests/test_cloud_config.py b/os_client_config/tests/test_cloud_config.py
index 1b98b8a..be2b8fe 100644
--- a/os_client_config/tests/test_cloud_config.py
+++ b/os_client_config/tests/test_cloud_config.py
@@ -225,6 +225,25 @@ class TestCloudConfig(base.TestCase):
             auth_version='2.0',
             timeout=None)
 
+    def test_legacy_client_object_store_endpoint(self):
+        mock_client = mock.Mock()
+        config_dict = defaults.get_defaults()
+        config_dict.update(fake_services_dict)
+        config_dict['object_store_endpoint'] = 'http://example.com/v2'
+        cc = cloud_config.CloudConfig(
+            "test1", "region-al", config_dict, auth_plugin=mock.Mock())
+        cc.get_legacy_client('object-store', mock_client)
+        mock_client.assert_called_with(
+            preauthtoken=mock.ANY,
+            os_options={
+                'auth_token': mock.ANY,
+                'region_name': 'region-al',
+                'object_storage_url': 'http://example.com/v2'
+            },
+            preauthurl='http://example.com/v2',
+            auth_version='2.0',
+            timeout=None)
+
     @mock.patch.object(cloud_config.CloudConfig, 'get_session_endpoint')
     def test_legacy_client_image(self, mock_get_session_endpoint):
         mock_client = mock.Mock()