diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index b326293e27dcfd448042369f4fd2eba10f0c60a2..642921e1fcbf809b069932f977356b10c71b37eb 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -37,6 +37,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-260 - Refine log
 - MS-249 - Check machine hardware during initialize
 - MS-261 - Update faiss version to 1.5.3 and add BUILD_FAISS_WITH_MKL as an option
+- MS-278 - add IndexStatsHelper
 
 ## New Feature
 - MS-180 - Add new mem manager