diff --git a/Lib/sunaudio.py b/Lib/sunaudio.py
index 3b0ee27..97d7332 100644
--- a/Lib/sunaudio.py
+++ b/Lib/sunaudio.py
@@ -1,4 +1,9 @@
 """Interpret sun audio headers."""
+from warnings import warnpy3k
+warnpy3k("the sunaudio module has been removed in Python 3.0; "
+         "use the sunau module instead", stacklevel=2)
+del warnpy3k
+
 
 MAGIC = '.snd'