#1535: rename __builtin__ module to builtins.
diff --git a/Doc/glossary.rst b/Doc/glossary.rst
index aa69867..cb75f84 100644
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -268,7 +268,7 @@
dictionaries. There are the local, global and builtin namespaces as well
as nested namespaces in objects (in methods). Namespaces support
modularity by preventing naming conflicts. For instance, the functions
- :func:`__builtin__.open` and :func:`os.open` are distinguished by their
+ :func:`builtins.open` and :func:`os.open` are distinguished by their
namespaces. Namespaces also aid readability and maintainability by making
it clear which module implements a function. For instance, writing
:func:`random.seed` or :func:`itertools.izip` makes it clear that those