diff --git a/core/src/main/java/org/acegisecurity/adapters/PrincipalAcegiUserToken.java b/core/src/main/java/org/acegisecurity/adapters/PrincipalAcegiUserToken.java
index d8f60f0161..3100c62a3b 100644
--- a/core/src/main/java/org/acegisecurity/adapters/PrincipalAcegiUserToken.java
+++ b/core/src/main/java/org/acegisecurity/adapters/PrincipalAcegiUserToken.java
@@ -43,7 +43,7 @@ public class PrincipalAcegiUserToken extends AbstractAdapterAuthenticationToken
         this.password = password;
     }
 
-    private PrincipalAcegiUserToken() {
+    protected PrincipalAcegiUserToken() {
         super();
     }