diff --git a/notes/mred/HISTORY b/notes/mred/HISTORY
index 47862681..9d9f5e97 100644
--- a/notes/mred/HISTORY
+++ b/notes/mred/HISTORY
@@ -1,4 +1,8 @@
 
+Version 199.16:
+
+ * Changed `demand-callback' to take a self argument.
+
 Version 199.15:
 
  * Added initialization arguments for all fields of all event%