diff --git a/doc/release-notes/teachpack/HISTORY.txt b/doc/release-notes/teachpack/HISTORY.txt
index 46dfcb75e2..c81f900890 100644
--- a/doc/release-notes/teachpack/HISTORY.txt
+++ b/doc/release-notes/teachpack/HISTORY.txt
@@ -1,3 +1,8 @@
+------------------------------------------------------------------------
+Version 4.0.1				  [Fri Jun 20 10:35:32 EDT 2008]
+
+* world.ss: replaced 'end-of-world' with a hook called 'stop-when'
+
 ------------------------------------------------------------------------
 VERSION 4.0				  [Thu May  8 11:03:30 EDT 2008]