diff --git a/CHANGES.txt b/CHANGES.txt
index 491277edf4..6d77428d7d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -29,6 +29,7 @@ Unreleased Changes
   Java:
   * Fixed a bug where setting optional proto3 enums with setFooValue() would
     not mark the value as present.
+  * Add Subtract function to FieldMaskUtil.
 
   C#:
   * Dropped support for netstandard1.0 (replaced by support for netstandard1.1).