diff -r 6aa7ca40b100 Lib/ssl.py
--- a/Lib/ssl.py	Thu Aug 29 13:39:44 2013 -0700
+++ b/Lib/ssl.py	Thu Aug 29 23:35:35 2013 +0200
@@ -144,7 +144,7 @@
     from _ssl import enum_cert_store, X509_ASN_ENCODING, PKCS_7_ASN_ENCODING
 
 from socket import getnameinfo as _getnameinfo
-from socket import socket, AF_INET, SOCK_STREAM, create_connection
+from socket import socket, AF_INET, SOCK_STREAM, SHUT_RDWR, create_connection
 import base64        # for DER-to-PEM translation
 import traceback
 import errno
@@ -571,6 +571,8 @@
 
     def shutdown(self, how):
         self._checkClosed()
+        if self._sslobj and how != SHUT_RDWR:
+            raise ValueError("SSL sockets don't support one-way shutdown")
         self._sslobj = None
         socket.shutdown(self, how)