diff -r 2e59e0b579e5 Lib/asyncio/base_events.py
--- a/Lib/asyncio/base_events.py	Wed May 28 18:50:12 2014 +0300
+++ b/Lib/asyncio/base_events.py	Thu May 29 10:14:44 2014 +0700
@@ -81,11 +81,11 @@
         self.active_count = 0
         self.waiters = []
 
-    def attach(self, transport):
+    def attach(self):
         assert self.sockets is not None
         self.active_count += 1
 
-    def detach(self, transport):
+    def detach(self):
         assert self.active_count > 0
         self.active_count -= 1
         if self.active_count == 0 and self.sockets is None:
diff -r 2e59e0b579e5 Lib/asyncio/proactor_events.py
--- a/Lib/asyncio/proactor_events.py	Wed May 28 18:50:12 2014 +0300
+++ b/Lib/asyncio/proactor_events.py	Thu May 29 10:14:44 2014 +0700
@@ -35,7 +35,7 @@
         self._closing = False  # Set when close() called.
         self._eof_written = False
         if self._server is not None:
-            self._server.attach(self)
+            self._server.attach()
         self._loop.call_soon(self._protocol.connection_made, self)
         if waiter is not None:
             self._loop.call_soon(waiter.set_result, None)
@@ -90,7 +90,7 @@
             self._sock.close()
             server = self._server
             if server is not None:
-                server.detach(self)
+                server.detach()
                 self._server = None
 
     def get_write_buffer_size(self):
diff -r 2e59e0b579e5 Lib/asyncio/selector_events.py
--- a/Lib/asyncio/selector_events.py	Wed May 28 18:50:12 2014 +0300
+++ b/Lib/asyncio/selector_events.py	Thu May 29 10:14:44 2014 +0700
@@ -378,7 +378,7 @@
         self._conn_lost = 0  # Set when call to connection_lost scheduled.
         self._closing = False  # Set when close() called.
         if self._server is not None:
-            self._server.attach(self)
+            self._server.attach()
 
     def abort(self):
         self._force_close(None)
@@ -425,7 +425,7 @@
             self._loop = None
             server = self._server
             if server is not None:
-                server.detach(self)
+                server.detach()
                 self._server = None
 
     def get_write_buffer_size(self):