diff --git a/Lib/asynchat.py b/Lib/asynchat.py
index ae82cfadcd0..65585129cea 100644
--- a/Lib/asynchat.py
+++ b/Lib/asynchat.py
@@ -77,7 +77,7 @@ class async_chat (asyncore.dispatcher):
     use_encoding            = 0
     encoding                = 'latin1'
 
-    def __init__ (self, conn=None):
+    def __init__ (self, sock=None, map=None):
         # for string terminator matching
         self.ac_in_buffer = b''
 
@@ -92,7 +92,7 @@ class async_chat (asyncore.dispatcher):
         # we toss the use of the "simple producer" and replace it with
         # a pure deque, which the original fifo was a wrapping of
         self.producer_fifo = deque()
-        asyncore.dispatcher.__init__ (self, conn)
+        asyncore.dispatcher.__init__ (self, sock, map)
 
     def collect_incoming_data(self, data):
         raise NotImplementedError("must be implemented in subclass")
diff --git a/Lib/asyncore.py b/Lib/asyncore.py
index e82d24bf4ff..586358cff1a 100644
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -98,8 +98,10 @@ def readwrite(obj, flags):
             obj.handle_read_event()
         if flags & select.POLLOUT:
             obj.handle_write_event()
-        if flags & (select.POLLERR | select.POLLHUP | select.POLLNVAL):
+        if flags & (select.POLLERR | select.POLLNVAL):
             obj.handle_expt_event()
+        if flags & select.POLLHUP:
+            obj.handle_close_event()
     except (ExitNow, KeyboardInterrupt, SystemExit):
         raise
     except:
@@ -466,7 +468,7 @@ class dispatcher:
                 ),
             'error'
             )
-        self.close()
+        self.handle_close()
 
     def handle_expt(self):
         self.log_info('unhandled exception', 'warning')
diff --git a/Lib/test/test_asyncore.py b/Lib/test/test_asyncore.py
index 716368b84f6..335bdede32c 100644
--- a/Lib/test/test_asyncore.py
+++ b/Lib/test/test_asyncore.py
@@ -39,6 +39,7 @@ class exitingdummy:
         raise asyncore.ExitNow()
 
     handle_write_event = handle_read_event
+    handle_close_event = handle_read_event
     handle_expt_event = handle_read_event
 
 class crashingdummy:
@@ -49,6 +50,7 @@ class crashingdummy:
         raise Exception()
 
     handle_write_event = handle_read_event
+    handle_close_event = handle_read_event
     handle_expt_event = handle_read_event
 
     def handle_error(self):
@@ -118,6 +120,7 @@ class HelperFunctionTests(unittest.TestCase):
                 def __init__(self):
                     self.read = False
                     self.write = False
+                    self.closed = False
                     self.expt = False
 
                 def handle_read_event(self):
@@ -126,6 +129,9 @@ class HelperFunctionTests(unittest.TestCase):
                 def handle_write_event(self):
                     self.write = True
 
+                def handle_close_event(self):
+                    self.closed = True
+
                 def handle_expt_event(self):
                     self.expt = True
 
@@ -168,9 +174,9 @@ class HelperFunctionTests(unittest.TestCase):
 
             for flag in (select.POLLERR, select.POLLHUP, select.POLLNVAL):
                 tobj = testobj()
-                self.assertEqual(tobj.expt, False)
+                self.assertEqual((tobj.expt, tobj.closed)[flag == select.POLLHUP], False)
                 asyncore.readwrite(tobj, flag)
-                self.assertEqual(tobj.expt, True)
+                self.assertEqual((tobj.expt, tobj.closed)[flag == select.POLLHUP], True)
 
                 # check that ExitNow exceptions in the object handler method
                 # bubbles all the way up through asyncore readwrite calls