Index: src/main/java/org/apache/jackrabbit/api/security/principal/NoSuchPrincipalException.java
===================================================================
--- src/main/java/org/apache/jackrabbit/api/security/principal/NoSuchPrincipalException.java	(revision 773105)
+++ src/main/java/org/apache/jackrabbit/api/security/principal/NoSuchPrincipalException.java	(working copy)
@@ -24,7 +24,9 @@
  */
 public class NoSuchPrincipalException extends RepositoryException {
 
-    public NoSuchPrincipalException(String message) {
+	private static final long serialVersionUID = 8266232691581481124L;
+
+	public NoSuchPrincipalException(String message) {
         super(message);
     }
 }
Index: src/main/java/org/apache/jackrabbit/api/security/user/AuthorizableExistsException.java
===================================================================
--- src/main/java/org/apache/jackrabbit/api/security/user/AuthorizableExistsException.java	(revision 773105)
+++ src/main/java/org/apache/jackrabbit/api/security/user/AuthorizableExistsException.java	(working copy)
@@ -23,6 +23,8 @@
  */
 public class AuthorizableExistsException extends RepositoryException {
 
+	private static final long serialVersionUID = 7875416346848889564L;
+
 	public AuthorizableExistsException(String msg) {
 		super(msg);
 	}