diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a2b051936537..45cf86a27f7aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -91,6 +91,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix sort related ITs for concurrent search ([#9177](https://github.com/opensearch-project/OpenSearch/pull/9466)
 - [Remote Store] Implicitly use replication type SEGMENT for remote store clusters ([#9264](https://github.com/opensearch-project/OpenSearch/pull/9264))
 - Separate request-based and settings-based concurrent segment search controls and introduce AggregatorFactory method to determine concurrent search support ([#9469](https://github.com/opensearch-project/OpenSearch/pull/9469))
+- 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 b4f0e474430f2..131e2a867ac8b 100644
--- a/server/src/main/java/org/opensearch/index/IndexModule.java
+++ b/server/src/main/java/org/opensearch/index/IndexModule.java
@@ -223,7 +223,6 @@ public Iterator<Setting<?>> settings() {
             "tvd",
             "liv",
             "dii",
-            "vec",
             "vem"
         ),
         Function.identity(),