diff -r c39a5eb3981e asyncio/selector_events.py
--- a/asyncio/selector_events.py	Tue Nov 25 17:23:22 2014 +0100
+++ b/asyncio/selector_events.py	Mon Dec 08 12:19:38 2014 +0100
@@ -72,11 +72,14 @@
             raise RuntimeError("Cannot close a running event loop")
         if self.is_closed():
             return
-        self._close_self_pipe()
         super().close()
         if self._selector is not None:
             self._selector.close()
             self._selector = None
+        # Close the pipe after the selector: don't affect the selector if it is
+        # shared between processes.
+        # See: http://bugs.python.org/issue21998#msg231819
+        self._close_self_pipe()
 
     def _socketpair(self):
         raise NotImplementedError