diff --git a/swift/common/middleware/s3api/s3token.py b/swift/common/middleware/s3api/s3token.py
index ed875b0e8a..c376dac5fa 100644
--- a/swift/common/middleware/s3api/s3token.py
+++ b/swift/common/middleware/s3api/s3token.py
@@ -195,7 +195,9 @@ class S3Token(object):
 
                 auth = auth_plugin.load_from_options(**auth_options)
                 session = keystone_session.Session(auth=auth)
-                self.keystoneclient = keystone_client.Client(session=session)
+                self.keystoneclient = keystone_client.Client(
+                    session=session,
+                    region_name=conf.get('region_name'))
                 self._logger.info("Caching s3tokens for %s seconds",
                                   self._secret_cache_duration)
             except Exception:
diff --git a/test/unit/common/middleware/s3api/test_s3token.py b/test/unit/common/middleware/s3api/test_s3token.py
index 6b43d1accf..b1b582c3b0 100644
--- a/test/unit/common/middleware/s3api/test_s3token.py
+++ b/test/unit/common/middleware/s3api/test_s3token.py
@@ -526,6 +526,7 @@ class S3TokenMiddlewareTestGood(S3TokenMiddlewareTestBase):
             'project_domain_name': 'default',
         })(FakeApp())
         self.assertEqual(20, self.middleware._secret_cache_duration)
+        self.assertIsNone(MOCK_KEYSTONE.mock_calls[0][2]['region_name'])
 
         cache = MOCK_CACHE_FROM_ENV.return_value
 
@@ -562,8 +563,11 @@ class S3TokenMiddlewareTestGood(S3TokenMiddlewareTestBase):
             'project_name': 'service',
             'user_domain_name': 'default',
             'project_domain_name': 'default',
+            'region_name': 'some-other-region',
         })(FakeApp())
         self.assertEqual(20, self.middleware._secret_cache_duration)
+        self.assertEqual(MOCK_KEYSTONE.mock_calls[0][2]['region_name'],
+                         'some-other-region')
 
         cache = MOCK_CACHE_FROM_ENV.return_value
         cache.get.return_value = None