diff --git a/Doc/library/email.message.rst b/Doc/library/email.message.rst
index 29f7ba3455d..11984a53642 100644
--- a/Doc/library/email.message.rst
+++ b/Doc/library/email.message.rst
@@ -222,12 +222,6 @@ Here are the methods of the :class:`Message` class:
       headers.
 
 
-   .. method:: Message.__contains__(name)
-
-      Return true if the message contains a header field named *name*, otherwise
-      return false.
-
-
    .. method:: keys()
 
       Return a list of all the message's header field names.