diff --git a/wallet/txauthor/author.go b/wallet/txauthor/author.go
index 18f996c..5290c77 100644
--- a/wallet/txauthor/author.go
+++ b/wallet/txauthor/author.go
@@ -83,12 +83,12 @@ type ChangeSource func() ([]byte, error)
 // InputSourceError is returned.
 //
 // BUGS: Fee estimation may be off when redeeming non-compressed P2PKH outputs.
-func NewUnsignedTransaction(outputs []*wire.TxOut, relayFeePerKb btcutil.Amount,
+func NewUnsignedTransaction(outputs []*wire.TxOut, feeRatePerKb btcutil.Amount,
 	fetchInputs InputSource, fetchChange ChangeSource) (*AuthoredTx, error) {
 
 	targetAmount := SumOutputValues(outputs)
 	estimatedSize := txsizes.EstimateVirtualSize(0, 1, 0, outputs, true)
-	targetFee := txrules.FeeForSerializeSize(relayFeePerKb, estimatedSize)
+	targetFee := txrules.FeeForSerializeSize(feeRatePerKb, estimatedSize)
 
 	for {
 		inputAmount, inputs, inputValues, scripts, err := fetchInputs(targetAmount + targetFee)
@@ -117,7 +117,7 @@ func NewUnsignedTransaction(outputs []*wire.TxOut, relayFeePerKb btcutil.Amount,
 
 		maxSignedSize := txsizes.EstimateVirtualSize(p2pkh, p2wpkh,
 			nested, outputs, true)
-		maxRequiredFee := txrules.FeeForSerializeSize(relayFeePerKb, maxSignedSize)
+		maxRequiredFee := txrules.FeeForSerializeSize(feeRatePerKb, maxSignedSize)
 		remainingAmount := inputAmount - targetAmount
 		if remainingAmount < maxRequiredFee {
 			targetFee = maxRequiredFee
@@ -133,7 +133,7 @@ func NewUnsignedTransaction(outputs []*wire.TxOut, relayFeePerKb btcutil.Amount,
 		changeIndex := -1
 		changeAmount := inputAmount - targetAmount - maxRequiredFee
 		if changeAmount != 0 && !txrules.IsDustAmount(changeAmount,
-			txsizes.P2WPKHPkScriptSize, relayFeePerKb) {
+			txsizes.P2WPKHPkScriptSize, txrules.DefaultRelayFeePerKb) {
 			changeScript, err := fetchChange()
 			if err != nil {
 				return nil, err