diff -r ce9881eecfb4 Lib/asyncio/base_events.py
--- a/Lib/asyncio/base_events.py	Thu Nov 27 22:14:30 2014 +0200
+++ b/Lib/asyncio/base_events.py	Thu Nov 27 23:57:54 2014 +0100
@@ -390,6 +390,7 @@
             raise TypeError("coroutines cannot be used with call_soon()")
         if self._debug and check_loop:
             self._assert_is_current_event_loop()
+        self._check_closed()
         handle = events.Handle(callback, args, self)
         if handle._source_traceback:
             del handle._source_traceback[-1]
diff -r ce9881eecfb4 Lib/test/test_asyncio/test_base_events.py
--- a/Lib/test/test_asyncio/test_base_events.py	Thu Nov 27 22:14:30 2014 +0200
+++ b/Lib/test/test_asyncio/test_base_events.py	Thu Nov 27 23:57:54 2014 +0100
@@ -66,6 +66,7 @@
         f = asyncio.Future(loop=self.loop)
         self.assertRaises(RuntimeError, self.loop.run_forever)
         self.assertRaises(RuntimeError, self.loop.run_until_complete, f)
+        self.assertRaises(RuntimeError, self.loop.call_soon, lambda: False)
 
     def test__add_callback_handle(self):
         h = asyncio.Handle(lambda: False, (), self.loop)