--- Lib/multiprocessing/connection.py.orig	2013-11-17 07:22:36.000000000 +0000
+++ Lib/multiprocessing/connection.py	2014-02-07 12:55:26.000000000 +0000
@@ -397,11 +397,12 @@
     def _send_bytes(self, buf):
         # For wire compatibility with 3.2 and lower
         n = len(buf)
-        self._send(struct.pack("!i", n))
+        payload = struct.pack("!i", n)
         # The condition is necessary to avoid "broken pipe" errors
         # when sending a 0-length buffer if the other end closed the pipe.
         if n > 0:
-            self._send(buf)
+            payload += buf
+        self._send(payload)
 
     def _recv_bytes(self, maxsize=None):
         buf = self._recv(4)