diff --git a/server/src/main/java/org/opensearch/index/shard/ReplicationGroup.java b/server/src/main/java/org/opensearch/index/shard/ReplicationGroup.java
index c0e59022c1cbe..dd04ee786d10f 100644
--- a/server/src/main/java/org/opensearch/index/shard/ReplicationGroup.java
+++ b/server/src/main/java/org/opensearch/index/shard/ReplicationGroup.java
@@ -207,6 +207,9 @@ public String toString() {
             + '}';
     }
 
+    /**
+     * Replication aware ShardRouting used for fanning out replication requests smartly.
+     */
     public static final class ReplicationAwareShardRouting {
 
         private final boolean remoteTranslogEnabled;