diff --git a/doc/release-notes/redex/HISTORY.txt b/doc/release-notes/redex/HISTORY.txt
index aede97fb27..f12b4611f7 100644
--- a/doc/release-notes/redex/HISTORY.txt
+++ b/doc/release-notes/redex/HISTORY.txt
@@ -13,6 +13,9 @@ v4.2.1
     'left-right/compact-side-conditions, and 
     'left-right/beside-side-conditions.
 
+  * added #:x-spacing and #:y-spacing parameters to traces and
+    traces/ps
+
 v4.2
 
   * minor bug fixes