diff --git a/RELEASES.txt b/RELEASES.txt
index 8b8aa42d..bd9fbc83 100644
--- a/RELEASES.txt
+++ b/RELEASES.txt
@@ -545,6 +545,8 @@ Planned
 
 * Add OS and compiler strings to Duktape.env
 
+* Make error 'tracedata' an internal property for better sandboxing
+
 * Fix DUK_INVALID_INDEX define value, it used INT_MIN directly
 
 * Fix return value of Duktape.gc() to return true (instead of false) for