diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 602014deebaa7b..16edb675f02d03 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1643,6 +1643,8 @@ Basic customization
 
    It is not guaranteed that :meth:`__del__` methods are called for objects
    that still exist when the interpreter exits.
+   :class:`weakref.finalize` provides a straightforward way to register
+   a cleanup function to be called when an object is garbage collected.
 
    .. note::