Fix typo.
diff --git a/Doc/library/email.policy.rst b/Doc/library/email.policy.rst
index 97358f0..d4e3fc1 100644
--- a/Doc/library/email.policy.rst
+++ b/Doc/library/email.policy.rst
@@ -99,7 +99,7 @@
Some email package methods accept a *policy* keyword argument, allowing the
policy to be overridden for that method. For example, the following code uses
-the :meth:`~email.message.Message.as_string` method of the *msg* object from
+the :meth:`~email.message.Message.as_bytes` method of the *msg* object from
the previous example and writes the message to a file using the native line
separators for the platform on which it is running::