mention how to override boolean evaluation
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index 1566a99..e5e40cf 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -1143,7 +1143,8 @@
control flow statements, the following values are interpreted as false:
``False``, ``None``, numeric zero of all types, and empty strings and containers
(including strings, tuples, lists, dictionaries, sets and frozensets). All
-other values are interpreted as true.
+other values are interpreted as true. (See the :meth:`~object.__nonzero__`
+special method for a way to change this.)
.. index:: operator: not