diff -r ab4d403cb0c0 Lib/subprocess.py
--- a/Lib/subprocess.py	Wed Jul 20 21:56:24 2011 +0800
+++ b/Lib/subprocess.py	Mon Sep 26 18:23:01 2011 +0200
@@ -216,8 +216,8 @@
 communicate(input=None)
     Interact with process: Send data to stdin.  Read data from stdout
     and stderr, until end-of-file is reached.  Wait for process to
-    terminate.  The optional input argument should be a string to be
-    sent to the child process, or None, if no data should be sent to
+    terminate.  The optional input argument should be a byte string to
+    be sent to the child process, or None, if no data should be sent to
     the child.
 
     communicate() returns a tuple (stdout, stderr).