diff --git a/Lib/tabnanny.py b/Lib/tabnanny.py
index c5adfb50085..8d3eab56d03 100755
--- a/Lib/tabnanny.py
+++ b/Lib/tabnanny.py
@@ -4,6 +4,10 @@
 
 # Released to the public domain, by Tim Peters, 15 April 1998.
 
+# XXX Note: this is now a standard library module.
+# XXX The API needs to undergo changes however; the current code is too
+# XXX script-like.  This will be addressed later.
+
 __version__ = "6"
 
 import os
diff --git a/Tools/idle/tabnanny.py b/Tools/idle/tabnanny.py
index c5adfb50085..8d3eab56d03 100755
--- a/Tools/idle/tabnanny.py
+++ b/Tools/idle/tabnanny.py
@@ -4,6 +4,10 @@
 
 # Released to the public domain, by Tim Peters, 15 April 1998.
 
+# XXX Note: this is now a standard library module.
+# XXX The API needs to undergo changes however; the current code is too
+# XXX script-like.  This will be addressed later.
+
 __version__ = "6"
 
 import os