diff --git a/core/src/main/java/org/bitcoinj/wallet/Wallet.java b/core/src/main/java/org/bitcoinj/wallet/Wallet.java
index c39a4e11..17df03f0 100644
--- a/core/src/main/java/org/bitcoinj/wallet/Wallet.java
+++ b/core/src/main/java/org/bitcoinj/wallet/Wallet.java
@@ -4842,7 +4842,7 @@ public class Wallet extends BaseTaggableObject
 
     //region Fee calculation code
 
-    public FeeCalculation calculateFee(SendRequest req, Coin value, List<TransactionInput> originalInputs,
+    private FeeCalculation calculateFee(SendRequest req, Coin value, List<TransactionInput> originalInputs,
                                        boolean needAtLeastReferenceFee, List<TransactionOutput> candidates) throws InsufficientMoneyException {
         checkState(lock.isHeldByCurrentThread());
         FeeCalculation result;