diff --git a/CHANGELOG.md b/CHANGELOG.md
index a28f63864..dafd1cbb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ IMPROVEMENTS:
 - core: Show installed version of Vagrant when displaying version check [GH-9968]
 - core/triggers: Catch and allow for non-standard exit codes with triggers `run` options [GH-10005]
 - provider/hyperv: Disable synced folders on non-DrvFs file systems by default [GH-10001]
+- util/downloader: Support custom suffix on user agent string [GH-9966]
 
 BUG FIXES: