diff --git a/server/src/main/java/org/opensearch/index/ReplicationStats.java b/server/src/main/java/org/opensearch/index/ReplicationStats.java
index 9cc6685c75f80..0ae4526365bf1 100644
--- a/server/src/main/java/org/opensearch/index/ReplicationStats.java
+++ b/server/src/main/java/org/opensearch/index/ReplicationStats.java
@@ -8,11 +8,9 @@
 
 package org.opensearch.index;
 
-import org.opensearch.common.unit.TimeValue;
 import org.opensearch.core.common.io.stream.StreamInput;
 import org.opensearch.core.common.io.stream.StreamOutput;
 import org.opensearch.core.common.io.stream.Writeable;
-import org.opensearch.core.common.unit.ByteSizeValue;
 import org.opensearch.core.xcontent.ToXContentFragment;
 import org.opensearch.core.xcontent.XContentBuilder;
 
@@ -76,9 +74,9 @@ public void writeTo(StreamOutput out) throws IOException {
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject(Fields.SEGMENT_REPLICATION);
-        builder.field(Fields.MAX_BYTES_BEHIND, new ByteSizeValue(maxBytesBehind).toString());
-        builder.field(Fields.TOTAL_BYTES_BEHIND, new ByteSizeValue(totalBytesBehind).toString());
-        builder.field(Fields.MAX_REPLICATION_LAG, new TimeValue(maxReplicationLag));
+        builder.field(Fields.MAX_BYTES_BEHIND, maxBytesBehind);
+        builder.field(Fields.TOTAL_BYTES_BEHIND, totalBytesBehind);
+        builder.field(Fields.MAX_REPLICATION_LAG, maxReplicationLag);
         builder.endObject();
         return builder;
     }
diff --git a/server/src/main/java/org/opensearch/index/shard/IndexShard.java b/server/src/main/java/org/opensearch/index/shard/IndexShard.java
index 3ca8ce0d97c61..f5d85b914231c 100644
--- a/server/src/main/java/org/opensearch/index/shard/IndexShard.java
+++ b/server/src/main/java/org/opensearch/index/shard/IndexShard.java
@@ -3016,7 +3016,7 @@ public ReplicationStats getReplicationStats() {
             long maxBytesBehind = stats.stream().mapToLong(SegmentReplicationShardStats::getBytesBehindCount).max().orElse(0L);
             long totalBytesBehind = stats.stream().mapToLong(SegmentReplicationShardStats::getBytesBehindCount).sum();
             long maxReplicationLag = stats.stream()
-                .mapToLong(SegmentReplicationShardStats::getCurrentReplicationTimeMillis)
+                .mapToLong(SegmentReplicationShardStats::getCurrentReplicationLagMillis)
                 .max()
                 .orElse(0L);
             return new ReplicationStats(maxBytesBehind, totalBytesBehind, maxReplicationLag);