versionadded
diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index 608f4f8..f3cd261 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -11,6 +11,8 @@
.. moduleauthor:: Benjamin Peterson <benjamin@python.org>
.. sectionauthor:: Benjamin Peterson <benjamin@python.org>
+.. versionadded:: 2.6
+
The :mod:`io` module provides the Python interfaces to stream handling.
Under Python 2.x, this is proposed as an alternative to the built-in
:class:`file` object, but in Python 3.x it is the default interface to