killbill-memoizeit

diff --git a/payment/src/main/java/org/killbill/billing/payment/api/DefaultDirectPayment.java b/payment/src/main/java/org/killbill/billing/payment/api/DefaultDirectPayment.java
index d009ebc..cf46cae 100644
--- a/payment/src/main/java/org/killbill/billing/payment/api/DefaultDirectPayment.java
+++ b/payment/src/main/java/org/killbill/billing/payment/api/DefaultDirectPayment.java
@@ -40,7 +40,7 @@ public class DefaultDirectPayment extends EntityBase implements DirectPayment {
     private final BigDecimal purchasedAmount;
     private final BigDecimal creditAmount;
     private final BigDecimal refundAmount;
-    private final boolean isVoided;
+    private final Boolean isVoided;
 
     private final Currency currency;
     private final List<DirectPaymentTransaction> transactions;
@@ -135,7 +135,7 @@ public class DefaultDirectPayment extends EntityBase implements DirectPayment {
     }
 
     @Override
-    public boolean isAuthVoided() {
+    public Boolean isAuthVoided() {
         return isVoided;
     }