diff --git a/core/src/main/java/org/bitcoinj/wallet/KeyTimeCoinSelector.java b/core/src/main/java/org/bitcoinj/wallet/KeyTimeCoinSelector.java
index cd34c204c..48ea41e86 100644
--- a/core/src/main/java/org/bitcoinj/wallet/KeyTimeCoinSelector.java
+++ b/core/src/main/java/org/bitcoinj/wallet/KeyTimeCoinSelector.java
@@ -97,6 +97,7 @@ public class KeyTimeCoinSelector implements CoinSelector {
     }
 
     private boolean isConfirmed(TransactionOutput output) {
-        return output.getParentTransaction().getConfidence().getConfidenceType().equals(TransactionConfidence.ConfidenceType.BUILDING);
+        Transaction parent = Objects.requireNonNull(output.getParentTransaction());
+        return parent.getConfidence().getConfidenceType().equals(TransactionConfidence.ConfidenceType.BUILDING);
     }
 }