diff --git a/CHANGELOG.md b/CHANGELOG.md
index fc0cf4238..05ba3be4c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 * Serialize all models into cluster metadata [#1499](https://github.com/opensearch-project/k-NN/pull/1499)
 ### Bug Fixes
 * Add stored fields for knn_vector type [#1630](https://github.com/opensearch-project/k-NN/pull/1630)
+* Ensure ignore_unmapped is set to correct value [#1655](https://github.com/opensearch-project/k-NN/pull/1655)
 ### Infrastructure
 * Add micro-benchmark module in k-NN plugin for benchmark streaming vectors to JNI layer functionality. [#1583](https://github.com/opensearch-project/k-NN/pull/1583)
 * Add arm64 check when SIMD is disabled [#1618](https://github.com/opensearch-project/k-NN/pull/1618)
diff --git a/src/main/java/org/opensearch/knn/index/query/KNNQueryBuilder.java b/src/main/java/org/opensearch/knn/index/query/KNNQueryBuilder.java
index 37114f3cb..3a24c1012 100644
--- a/src/main/java/org/opensearch/knn/index/query/KNNQueryBuilder.java
+++ b/src/main/java/org/opensearch/knn/index/query/KNNQueryBuilder.java
@@ -267,7 +267,7 @@ public static KNNQueryBuilder fromXContent(XContentParser parser) throws IOExcep
                             max_distance = (Float) NumberFieldMapper.NumberType.FLOAT.parse(parser.objectBytes(), false);
                         } else if (MIN_SCORE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                             min_score = (Float) NumberFieldMapper.NumberType.FLOAT.parse(parser.objectBytes(), false);
-                        } else if (IGNORE_UNMAPPED_FIELD.getPreferredName().equals("ignore_unmapped")) {
+                        } else if (IGNORE_UNMAPPED_FIELD.getPreferredName().equals(currentFieldName)) {
                             if (isClusterOnOrAfterMinRequiredVersion("ignore_unmapped")) {
                                 ignoreUnmapped = parser.booleanValue();
                             }