diff --git a/doc/release-notes/redex/HISTORY.txt b/doc/release-notes/redex/HISTORY.txt
index 365b5c8a32..7475409562 100644
--- a/doc/release-notes/redex/HISTORY.txt
+++ b/doc/release-notes/redex/HISTORY.txt
@@ -1,3 +1,7 @@
+v4.2.1
+
+  * added a first attempt at 'define-relation' 
+
 v4.2
 
   * minor bug fixes