diff --git a/Lib/SocketServer.py b/Lib/SocketServer.py
index 00064ba8968..5128e17548f 100644
--- a/Lib/SocketServer.py
+++ b/Lib/SocketServer.py
@@ -448,10 +448,15 @@ class ForkingMixIn:
 class ThreadingMixIn:
     """Mix-in class to handle each request in a new thread."""
 
+    def process_request_thread(self, request, client_address):
+        """Same as in BaseServer but as a thread."""
+        self.finish_request(request, client_address)
+        self.close_request(request)
+
     def process_request(self, request, client_address):
         """Start a new thread to process the request."""
         import threading
-        t = threading.Thread(target = self.finish_request,
+        t = threading.Thread(target = self.process_request_thread,
                              args = (request, client_address))
         t.start()
 
diff --git a/Misc/ACKS b/Misc/ACKS
index e7400e9e51a..b17219a9508 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -296,6 +296,7 @@ Takahiro Nakayama
 Travers Naran
 Fredrik Nehr
 Chad Netzer
+Max Neunhöffer
 George Neville-Neil
 Oscar Nierstrasz
 Hrvoje Niksic
diff --git a/Misc/NEWS b/Misc/NEWS
index e2e9683344a..e89b789ba13 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -86,6 +86,9 @@ Library
   which indicates whether output is intended for the header 'Q'
   encoding.
 
+- The SocketServer.ThreadingMixIn class now closes the request after
+  finish_request() returns.  (Not when it errors out though.)
+
 Tools/Demos
 
 - Demo/dns was removed.  It no longer serves any purpose; a package