Formally deprecate old classes in the cgi module.
diff --git a/Doc/library/cgi.rst b/Doc/library/cgi.rst
index 3b82e7b..00deea6 100644
--- a/Doc/library/cgi.rst
+++ b/Doc/library/cgi.rst
@@ -250,9 +250,11 @@
Old classes
-----------
-These classes, present in earlier versions of the :mod:`cgi` module, are still
-supported for backward compatibility. New applications should use the
-:class:`FieldStorage` class.
+.. deprecated:: 2.6
+
+ These classes, present in earlier versions of the :mod:`cgi` module, are
+ still supported for backward compatibility. New applications should use the
+ :class:`FieldStorage` class.
:class:`SvFormContentDict` stores single value form content as dictionary; it
assumes each field name occurs in the form only once.