diff --git a/invoice/src/main/java/org/killbill/billing/invoice/tree/ItemsNodeInterval.java b/invoice/src/main/java/org/killbill/billing/invoice/tree/ItemsNodeInterval.java
index bc27585..fbb5ba5 100644
--- a/invoice/src/main/java/org/killbill/billing/invoice/tree/ItemsNodeInterval.java
+++ b/invoice/src/main/java/org/killbill/billing/invoice/tree/ItemsNodeInterval.java
@@ -235,12 +235,12 @@ public class ItemsNodeInterval extends NodeInterval {
return ((ItemsNodeInterval) curNode).getItemsInterval().findItem(targetId) != null;
}
});
- Preconditions.checkNotNull(item, "Unable to find item interval for id='%s', tree=%s", targetId, this);
+ Preconditions.checkNotNull(node, "Unable to find item interval for id='%s', tree=%s", targetId, this);
final ItemsInterval targetItemsInterval = ((ItemsNodeInterval) node).getItemsInterval();
final List<Item> targetItems = targetItemsInterval.getItems();
final Item targetItem = targetItemsInterval.findItem(targetId);
- Preconditions.checkNotNull(item, "Unable to find item with id='%s', items=%s", targetId, targetItems);
+ Preconditions.checkNotNull(targetItem, "Unable to find item with id='%s', items=%s", targetId, targetItems);
final BigDecimal adjustmentAmount = item.getAmount().negate();
if (targetItem.getAmount().compareTo(adjustmentAmount) == 0) {
