diff --git a/requests_unixsocket/adapters.py b/requests_unixsocket/adapters.py
index 37351e5..a2c1564 100644
--- a/requests_unixsocket/adapters.py
+++ b/requests_unixsocket/adapters.py
@@ -28,6 +28,11 @@ class UnixHTTPConnection(httplib.HTTPConnection, object):
         super(UnixHTTPConnection, self).__init__('localhost', timeout=timeout)
         self.unix_socket_url = unix_socket_url
         self.timeout = timeout
+        self.sock = None
+
+    def __del__(self):  # base class does not have d'tor
+        if self.sock:
+            self.sock.close()
 
     def connect(self):
         sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)