-NotebookSizer = wx._deprecated(NotebookSizer, "NotebookSizer is no longer needed.")
-BookCtrlSizer = wx._deprecated(BookCtrlSizer, "BookCtrlSizer is no longer needed.")
+NotebookSizer.__init__ = wx._deprecated(NotebookSizer.__init__, "NotebookSizer is no longer needed.")
+BookCtrlSizer.__init__ = wx._deprecated(BookCtrlSizer.__init__, "BookCtrlSizer is no longer needed.")