diff --git a/Docs/ChangeLog-4x.md b/Docs/ChangeLog-4x.md
index fe973ba3..6847d485 100644
--- a/Docs/ChangeLog-4x.md
+++ b/Docs/ChangeLog-4x.md
@@ -17,6 +17,7 @@ The 4.9.0 release is a minor maintenance release.
   * **Bug fix:** Fixed incorrect return type in "None" vector library
     reference implementation.
   * **Feature:** Added backend for Arm SVE fixed-width 256-bit builds.
+  * **Feature:** Added backend for Arm SVE fixed-width 128-bit builds.
   * **Feature:** Optimized NEON mask `any()` and `all()` functions.
   * **Feature:** Migrated build and test to GitHub Actions pipelines.