diff -r b153c341e6ef Lib/asyncore.py
--- a/Lib/asyncore.py	Wed Mar 16 02:35:37 2011 +0100
+++ b/Lib/asyncore.py	Tue Mar 15 20:40:48 2011 -0500
@@ -617,6 +617,9 @@
         def __init__(self, fd):
             self.fd = os.dup(fd)
 
+        def __exit__(self):
+            self.close()
+
         def recv(self, *args):
             return os.read(self.fd, *args)
 
diff -r b153c341e6ef Misc/ACKS
--- a/Misc/ACKS	Wed Mar 16 02:35:37 2011 +0100
+++ b/Misc/ACKS	Tue Mar 15 20:40:48 2011 -0500
@@ -358,6 +358,7 @@
 Shane Hathaway
 Rycharde Hawkes
 Jochen Hayek
+Ben Hayden
 Christian Heimes
 Thomas Heller
 Malte Helmert