diff -r fa57e31fd4c2 asyncio/subprocess.py
--- a/asyncio/subprocess.py	Wed Oct 08 11:46:30 2014 -0700
+++ b/asyncio/subprocess.py	Tue Oct 21 13:15:37 2014 -0700
@@ -41,15 +41,19 @@
 
     def connection_made(self, transport):
         self._transport = transport
-        if transport.get_pipe_transport(1):
+        t1 = transport.get_pipe_transport(1)
+        if t1 is not None:
             self.stdout = streams.StreamReader(limit=self._limit,
                                                loop=self._loop)
-        if transport.get_pipe_transport(2):
+            self.stdout.set_transport(t1)
+        t2 = transport.get_pipe_transport(2)
+        if t2 is not None:
             self.stderr = streams.StreamReader(limit=self._limit,
                                                loop=self._loop)
-        stdin = transport.get_pipe_transport(0)
-        if stdin is not None:
-            self.stdin = streams.StreamWriter(stdin,
+            self.stderr.set_transport(t2)
+        t0 = transport.get_pipe_transport(0)
+        if t0 is not None:
+            self.stdin = streams.StreamWriter(t0,
                                               protocol=self,
                                               reader=None,
                                               loop=self._loop)