diff -r 01676a4c16ff Lib/selectors.py
--- a/Lib/selectors.py	Sun Dec 08 10:06:04 2013 +0100
+++ b/Lib/selectors.py	Sun Dec 08 12:12:30 2013 +0100
@@ -396,7 +396,7 @@ if hasattr(select, 'epoll'):
             key = super().unregister(fileobj)
             try:
                 self._epoll.unregister(key.fd)
-            except OSError:
+            except FileNotFoundError:
                 # This can happen if the FD was closed since it
                 # was registered.
                 pass