diff --git a/swift/common/middleware/proxy_logging.py b/swift/common/middleware/proxy_logging.py
index b0509fe079..5af43d3cd3 100644
--- a/swift/common/middleware/proxy_logging.py
+++ b/swift/common/middleware/proxy_logging.py
@@ -253,10 +253,10 @@ class ProxyLoggingMiddleware(object):
                     break
             else:
                 if not chunk:
-                    start_response_args[0][1].append(('content-length', '0'))
+                    start_response_args[0][1].append(('Content-Length', '0'))
                 elif isinstance(iterable, list):
                     start_response_args[0][1].append(
-                        ('content-length', str(sum(len(i) for i in iterable))))
+                        ('Content-Length', str(sum(len(i) for i in iterable))))
             start_response(*start_response_args[0])
             req = Request(env)
 
diff --git a/swift/common/wsgi.py b/swift/common/wsgi.py
index 7aab048310..43cee2fc9e 100644
--- a/swift/common/wsgi.py
+++ b/swift/common/wsgi.py
@@ -16,6 +16,7 @@
 """WSGI tools for use with swift."""
 
 import errno
+import inspect
 import os
 import signal
 import time
@@ -386,7 +387,14 @@ def run_server(conf, logger, sock, global_conf=None):
     max_clients = int(conf.get('max_clients', '1024'))
     pool = RestrictedGreenPool(size=max_clients)
     try:
-        wsgi.server(sock, app, NullLogger(), custom_pool=pool)
+        # Disable capitalizing headers in Eventlet if possible.  This is
+        # necessary for the AWS SDK to work with swift3 middleware.
+        argspec = inspect.getargspec(wsgi.server)
+        if 'capitalize_response_headers' in argspec.args:
+            wsgi.server(sock, app, NullLogger(), custom_pool=pool,
+                        capitalize_response_headers=False)
+        else:
+            wsgi.server(sock, app, NullLogger(), custom_pool=pool)
     except socket.error as err:
         if err[0] != errno.EINVAL:
             raise
diff --git a/test/unit/common/test_wsgi.py b/test/unit/common/test_wsgi.py
index d173357fe7..c2f0a3eb56 100644
--- a/test/unit/common/test_wsgi.py
+++ b/test/unit/common/test_wsgi.py
@@ -333,10 +333,11 @@ class TestWSGI(unittest.TestCase):
                             'modify_wsgi_pipeline'):
                 with mock.patch('swift.common.wsgi.wsgi') as _wsgi:
                     with mock.patch('swift.common.wsgi.eventlet') as _eventlet:
-                        conf = wsgi.appconfig(conf_file)
-                        logger = logging.getLogger('test')
-                        sock = listen(('localhost', 0))
-                        wsgi.run_server(conf, logger, sock)
+                        with mock.patch('swift.common.wsgi.inspect'):
+                            conf = wsgi.appconfig(conf_file)
+                            logger = logging.getLogger('test')
+                            sock = listen(('localhost', 0))
+                            wsgi.run_server(conf, logger, sock)
         self.assertEquals('HTTP/1.0',
                           _wsgi.HttpProtocol.default_request_version)
         self.assertEquals(30, _wsgi.WRITE_TIMEOUT)
@@ -354,6 +355,43 @@ class TestWSGI(unittest.TestCase):
         self.assert_('custom_pool' in kwargs)
         self.assertEquals(1000, kwargs['custom_pool'].size)
 
+    def test_run_server_with_latest_eventlet(self):
+        config = """
+        [DEFAULT]
+        swift_dir = TEMPDIR
+
+        [pipeline:main]
+        pipeline = proxy-server
+
+        [app:proxy-server]
+        use = egg:swift#proxy
+        """
+
+        def argspec_stub(server):
+            return mock.MagicMock(args=['capitalize_response_headers'])
+
+        contents = dedent(config)
+        with temptree(['proxy-server.conf']) as t:
+            conf_file = os.path.join(t, 'proxy-server.conf')
+            with open(conf_file, 'w') as f:
+                f.write(contents.replace('TEMPDIR', t))
+            _fake_rings(t)
+            with nested(
+                mock.patch('swift.proxy.server.Application.'
+                           'modify_wsgi_pipeline'),
+                mock.patch('swift.common.wsgi.wsgi'),
+                mock.patch('swift.common.wsgi.eventlet'),
+                mock.patch('swift.common.wsgi.inspect',
+                           getargspec=argspec_stub)) as (_, _wsgi, _, _):
+                conf = wsgi.appconfig(conf_file)
+                logger = logging.getLogger('test')
+                sock = listen(('localhost', 0))
+                wsgi.run_server(conf, logger, sock)
+
+        _wsgi.server.assert_called()
+        args, kwargs = _wsgi.server.call_args
+        self.assertEquals(kwargs.get('capitalize_response_headers'), False)
+
     def test_run_server_conf_dir(self):
         config_dir = {
             'proxy-server.conf.d/pipeline.conf': """
@@ -382,11 +420,12 @@ class TestWSGI(unittest.TestCase):
                 with mock.patch('swift.common.wsgi.wsgi') as _wsgi:
                     with mock.patch('swift.common.wsgi.eventlet') as _eventlet:
                         with mock.patch.dict('os.environ', {'TZ': ''}):
-                            conf = wsgi.appconfig(conf_dir)
-                            logger = logging.getLogger('test')
-                            sock = listen(('localhost', 0))
-                            wsgi.run_server(conf, logger, sock)
-                            self.assert_(os.environ['TZ'] is not '')
+                            with mock.patch('swift.common.wsgi.inspect'):
+                                conf = wsgi.appconfig(conf_dir)
+                                logger = logging.getLogger('test')
+                                sock = listen(('localhost', 0))
+                                wsgi.run_server(conf, logger, sock)
+                                self.assert_(os.environ['TZ'] is not '')
 
         self.assertEquals('HTTP/1.0',
                           _wsgi.HttpProtocol.default_request_version)