#756982: Remove rfc822 reference.
diff --git a/Doc/library/mailbox.rst b/Doc/library/mailbox.rst
index 6db68ee..e437b7a 100644
--- a/Doc/library/mailbox.rst
+++ b/Doc/library/mailbox.rst
@@ -277,7 +277,7 @@
^^^^^^^^^^^^^^^^
-.. class:: Maildir(dirname[, factory=rfc822.Message[, create=True]])
+.. class:: Maildir(dirname[, factory=None[, create=True]])
A subclass of :class:`Mailbox` for mailboxes in Maildir format. Parameter
*factory* is a callable object that accepts a file-like message representation
@@ -286,10 +286,7 @@
representation. If *create* is ``True``, the mailbox is created if it does not
exist.
- It is for historical reasons that *factory* defaults to :class:`rfc822.Message`
- and that *dirname* is named as such rather than *path*. For a :class:`Maildir`
- instance that behaves like instances of other :class:`Mailbox` subclasses, set
- *factory* to ``None``.
+ It is for historical reasons that *dirname* is named as such rather than *path*.
Maildir is a directory-based mailbox format invented for the qmail mail
transfer agent and now widely supported by other programs. Messages in a