diff --git a/htdp-lib/stepper/HISTORY.txt b/htdp-lib/stepper/HISTORY.txt
index 4f652489..8535819b 100644
--- a/htdp-lib/stepper/HISTORY.txt
+++ b/htdp-lib/stepper/HISTORY.txt
@@ -1,6 +1,10 @@
 Stepper
 -------
 
+Changes for 8.15:
+
+Bug fixes, thanks to Mike Sperber and Robby Findler
+
 Changes for 8.14:
 
 None.