diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5cb1665f6..09f4c0d8d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Enhancements
 ### Bug Fixes
 * Fixing the arithmetic to find the number of vectors to stream from java to jni layer.[#1804](https://github.com/opensearch-project/k-NN/pull/1804)
+* Release memory properly for an array type [#1820](https://github.com/opensearch-project/k-NN/pull/1820)
 ### Infrastructure
 ### Documentation
 * Update dev guide to fix clang linking issue on arm [#1746](https://github.com/opensearch-project/k-NN/pull/1746)
diff --git a/jni/patches/faiss/0001-Custom-patch-to-support-multi-vector.patch b/jni/patches/faiss/0001-Custom-patch-to-support-multi-vector.patch
index de5806ef0..7afdabc1f 100644
--- a/jni/patches/faiss/0001-Custom-patch-to-support-multi-vector.patch
+++ b/jni/patches/faiss/0001-Custom-patch-to-support-multi-vector.patch
@@ -450,7 +450,7 @@ index 713fe8e4..d307fd70 100644
 +        /// series of results for query i is done
 +        void end() {
 +            heap_reorder<C>(k, heap_dis, heap_ids);
-+            delete heap_group_ids;
++            delete[] heap_group_ids;
 +        }
 +    };
 +
@@ -527,8 +527,8 @@ index 713fe8e4..d307fd70 100644
 +        for (size_t i = i0; i < i1; i++) {
 +            heap_reorder<C>(k, heap_dis_tab + i * k, heap_ids_tab + i * k);
 +        }
-+        delete group_id_to_index_in_heap_tab;
-+        delete heap_group_ids_tab;
++        delete[] group_id_to_index_in_heap_tab;
++        delete[] heap_group_ids_tab;
 +    }
 +};
 +