diff --git a/racket/collects/racket/HISTORY.txt b/racket/collects/racket/HISTORY.txt
index e7d0c4a745..63992dfd20 100644
--- a/racket/collects/racket/HISTORY.txt
+++ b/racket/collects/racket/HISTORY.txt
@@ -1,3 +1,6 @@
+Version 5.90.0.10
+Added chaperone-channel and impersonate-channel
+
 Version 5.90.0.9
 Allow hash table chaperones and impersonators to support efficient
  hash-clear and hash-clear!