diff --git a/CHANGELOG b/CHANGELOG
index edce2c6fd..4d4564219 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,8 @@
 0.83.20
-  - 
+  - Added stub IBM ROM BASIC points in the BIOS area
+    so that when MS-DOS 1.x and 2.x BASIC.COM and BASICA.COM
+    are run, a polite message is displayed instead of
+    invalid code and crashes.
 0.83.19
   - Reorganized the "List network interfaces" and "List
     printer devices" dialogs (under the "Help" menu) to