diff --git a/Lib/toaiff.py b/Lib/toaiff.py
index 3c8a02b..3a2b80c 100644
--- a/Lib/toaiff.py
+++ b/Lib/toaiff.py
@@ -7,6 +7,9 @@
 in the latter case the caller must ensure that it is removed.
 Other temporary files used are removed by the function.
 """
+from warnings import warnpy3k
+warnpy3k("the toaiff module has been removed in Python 3.0", stacklevel=2)
+del warnpy3k
 
 import os
 import tempfile