#1582: document __reversed__, patch by Mark Russell.
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 4f86fc7..693af64 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -977,12 +977,16 @@
.. function:: reversed(seq)
- Return a reverse :term:`iterator`. *seq* must be an object which supports
- the sequence protocol (the :meth:`__len__` method and the :meth:`__getitem__`
- method with integer arguments starting at ``0``).
+ Return a reverse :term:`iterator`. *seq* must be an object which has
+ a :meth:`__reversed__` method or supports the sequence protocol (the
+ :meth:`__len__` method and the :meth:`__getitem__` method with integer
+ arguments starting at ``0``).
.. versionadded:: 2.4
+ .. versionchanged:: 2.6
+ Added the possibility to write a custom :meth:`__reversed__` method.
+
.. function:: round(x[, n])