diff --git a/server/src/main/java/org/opensearch/index/mapper/WildcardFieldMapper.java b/server/src/main/java/org/opensearch/index/mapper/WildcardFieldMapper.java
index e43e3bda692e7..cd30c8a4ff7d0 100644
--- a/server/src/main/java/org/opensearch/index/mapper/WildcardFieldMapper.java
+++ b/server/src/main/java/org/opensearch/index/mapper/WildcardFieldMapper.java
@@ -101,7 +101,7 @@ public static final class Builder extends ParametrizedFieldMapper.Builder {
         );
         private final Parameter<String> normalizer = Parameter.stringParam("normalizer", false, m -> toType(m).normalizerName, "default");
         private final Parameter<Map<String, String>> meta = Parameter.metaParam();
-        private final Parameter<Boolean> hasDocValues = Parameter.docValuesParam(m -> toType(m).hasDocValues, false);
+        private final Parameter<Boolean> hasDocValues = Parameter.docValuesParam(m -> toType(m).hasDocValues, false).alwaysSerialize();
         private final IndexAnalyzers indexAnalyzers;
 
         public Builder(String name, IndexAnalyzers indexAnalyzers) {