diff --git a/redback-authentication/redback-authentication-api/src/main/java/org/apache/archiva/redback/authentication/AuthenticationResult.java b/redback-authentication/redback-authentication-api/src/main/java/org/apache/archiva/redback/authentication/AuthenticationResult.java
index 29be90ba..90a4cf07 100644
--- a/redback-authentication/redback-authentication-api/src/main/java/org/apache/archiva/redback/authentication/AuthenticationResult.java
+++ b/redback-authentication/redback-authentication-api/src/main/java/org/apache/archiva/redback/authentication/AuthenticationResult.java
@@ -32,6 +32,9 @@ import java.util.Map;
 public class AuthenticationResult
     implements Serializable
 {
+
+    private static final long serialVersionUID = 354054054054L;
+
     private boolean isAuthenticated;
 
     private String principal;