diff --git a/Lib/ssl.py b/Lib/ssl.py
index ced3149..73d5ef7 100644
--- a/Lib/ssl.py
+++ b/Lib/ssl.py
@@ -139,7 +139,7 @@ class SSLSocket(object):
             if ciphers:
                 self._context.set_ciphers(ciphers)
 
-        self.engine = self.context._createSSLEngine()
+        self.engine = self.context._createSSLEngine(cert_file=certfile, key_file=keyfile)
         self.server_side = server_side
         self.engine.setUseClientMode(not server_side)
         self.ssl_handler = None
@@ -471,7 +471,7 @@ class SSLContext(object):
         return SSLSocket(sock, keyfile=None, certfile=None, ca_certs=None, suppress_ragged_eofs=suppress_ragged_eofs,
                          do_handshake_on_connect=do_handshake_on_connect, server_side=server_side, _context=self)
 
-    def _createSSLEngine(self):
+    def _createSSLEngine(self, cert_file=None, key_file=None):
         trust_managers = [NoVerifyX509TrustManager()]
         if self.verify_mode == CERT_REQUIRED:
             tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm())
@@ -479,7 +479,7 @@ class SSLContext(object):
             trust_managers = tmf.getTrustManagers()
 
         if self._key_managers is None:  # get an e
-            self._context.init(_get_openssl_key_manager().getKeyManagers(), trust_managers, None)
+            self._context.init(_get_openssl_key_manager(cert_file=cert_file, key_file=key_file).getKeyManagers(), trust_managers, None)
         else:
             self._context.init(self._key_managers.getKeyManagers(), trust_managers, None)