diff --git a/libs/core/src/main/java/org/opensearch/core/common/util/CollectionUtils.java b/libs/core/src/main/java/org/opensearch/core/common/util/CollectionUtils.java
index 5cb8b900814b9..edc544b67c42e 100644
--- a/libs/core/src/main/java/org/opensearch/core/common/util/CollectionUtils.java
+++ b/libs/core/src/main/java/org/opensearch/core/common/util/CollectionUtils.java
@@ -139,6 +139,7 @@ private static Iterable<?> convert(Object value) {
             return null;
         }
         if (value instanceof Map) {
+            @SuppressWarnings("unchecked")
             Map<?, ?> map = (Map<?, ?>) value;
             return () -> Iterators.concat(map.keySet().iterator(), map.values().iterator());
         } else if ((value instanceof Iterable) && (value instanceof Path == false)) {