diff --git a/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/FlintSparkIndexOptions.scala b/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/FlintSparkIndexOptions.scala
index b866463c8..1ad88de6d 100644
--- a/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/FlintSparkIndexOptions.scala
+++ b/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/FlintSparkIndexOptions.scala
@@ -97,7 +97,7 @@ case class FlintSparkIndexOptions(options: Map[String, String]) {
   def indexSettings(): Option[String] = getOptionValue(INDEX_SETTINGS)
 
   /**
-   * An expression that generates unique value as source data row ID.
+   * An expression that generates unique value as index data row ID.
    *
    * @return
    *   ID expression