diff --git a/common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/domain/User.java b/common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/domain/User.java
index 0ce93ccec3..e8d5ff7dcb 100644
--- a/common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/domain/User.java
+++ b/common/openstack/src/main/java/org/jclouds/openstack/keystone/v2_0/domain/User.java
@@ -98,11 +98,17 @@ public class User implements Comparable<User> {
    protected final String name;
    protected final Set<Role> roles;
 
-   public User(String id, String name, Set<Role> roles) {
+   protected User(String id, String name, Set<Role> roles) {
       this.id = checkNotNull(id, "id");
       this.name = checkNotNull(name, "name");
       this.roles = ImmutableSet.copyOf(checkNotNull(roles, "roles"));
    }
+   
+   protected User() {
+      id = null;
+      name = null;
+      roles = ImmutableSet.of();
+   }
 
    /**
     * When providing an ID, it is assumed that the user exists in the current OpenStack deployment