diff -r 3ae2cd85a908 Doc/library/select.rst
--- a/Doc/library/select.rst	Sun Mar 09 11:18:16 2014 +0100
+++ b/Doc/library/select.rst	Sun Mar 30 16:16:55 2014 +0530
@@ -377,9 +377,13 @@
 
    Modifies an already registered fd. This has the same effect as
    ``register(fd, eventmask)``.  Attempting to modify a file descriptor
-   that was never registered causes an :exc:`IOError` exception with errno
+   that was never registered causes an :exc:`OSError` exception with errno
    :const:`ENOENT` to be raised.
 
+   .. deprecated:: 3.3
+
+   	:exc:`IOError` exception. Instead the OSError exception is used now.
+
 
 .. method:: poll.unregister(fd)