diff --git a/src/main/java/org/opensearch/security/auth/UserInjector.java b/src/main/java/org/opensearch/security/auth/UserInjector.java
index 9ddf9b5647..65a7055238 100644
--- a/src/main/java/org/opensearch/security/auth/UserInjector.java
+++ b/src/main/java/org/opensearch/security/auth/UserInjector.java
@@ -67,7 +67,7 @@ public UserInjector(Settings settings, ThreadPool threadPool, AuditLog auditLog,
     }
 
     public static class InjectedUser extends User {
-        transient TransportAddress transportAddress;
+        private transient TransportAddress transportAddress;
 
         public InjectedUser(String name) {
             super(name);