diff --git a/Doc/library/pickle.rst b/Doc/library/pickle.rst
index ba00ba29f5ba48..93387fb0b45038 100644
--- a/Doc/library/pickle.rst
+++ b/Doc/library/pickle.rst
@@ -494,7 +494,8 @@ What can be pickled and unpickled?
 
 The following types can be pickled:
 
-* ``None``, ``True``, and ``False``;
+* built-in constants (``None``, ``True``, ``False``, ``Ellipsis``, and
+  ``NotImplemented``);
 
 * integers, floating-point numbers, complex numbers;