diff --git a/Doc/library/datetime.rst b/Doc/library/datetime.rst
index b1b5e04c74b066..f40c6cea83820c 100644
--- a/Doc/library/datetime.rst
+++ b/Doc/library/datetime.rst
@@ -1735,7 +1735,7 @@ day, and subject to adjustment via a :class:`tzinfo` object.
    * ``fold in [0, 1]``.
 
    If an argument outside those ranges is given, :exc:`ValueError` is raised. All
-   default to 0 except *tzinfo*, which defaults to :const:`None`.
+   default to 0 except *tzinfo*, which defaults to ``None``.
 
 Class attributes: