diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f11aee27729e..79ed4c172bea9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -112,6 +112,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Added sampler based on `Blanket Probabilistic Sampling rate` and `Override for on demand` ([#9621](https://github.com/opensearch-project/OpenSearch/issues/9621))
 - Decouple replication lag from logic to fail stale replicas ([#9507](https://github.com/opensearch-project/OpenSearch/pull/9507))
 - [Remote Store] Add support for Remote Translog Store stats in `_remotestore/stats/` API ([#9263](https://github.com/opensearch-project/OpenSearch/pull/9263))
+- Removing the vec file extension from INDEX_STORE_HYBRID_NIO_EXTENSIONS, to ensure the no performance degradation for vector search via Lucene Engine.([#9528](https://github.com/opensearch-project/OpenSearch/pull/9528)))
 
 ### Deprecated
 
diff --git a/server/src/main/java/org/opensearch/index/IndexModule.java b/server/src/main/java/org/opensearch/index/IndexModule.java
index 678da57149e91..8692876412ea9 100644
--- a/server/src/main/java/org/opensearch/index/IndexModule.java
+++ b/server/src/main/java/org/opensearch/index/IndexModule.java
@@ -225,7 +225,6 @@ public Iterator<Setting<?>> settings() {
             "tvd",
             "liv",
             "dii",
-            "vec",
             "vem"
         ),
         Function.identity(),