diff --git a/lnwallet/interface.go b/lnwallet/interface.go
index ad5d2ecb..af86ebf3 100644
--- a/lnwallet/interface.go
+++ b/lnwallet/interface.go
@@ -151,9 +151,11 @@ type WalletController interface {
 
 	// SendOutputs funds, signs, and broadcasts a Bitcoin transaction
 	// paying out to the specified outputs. In the case the wallet has
-	// insufficient funds, or the outputs are non-standard, an error
-	// should be returned.
-	SendOutputs(outputs []*wire.TxOut) (*chainhash.Hash, error)
+	// insufficient funds, or the outputs are non-standard, an error should
+	// be returned. This method also takes the target fee expressed in
+	// sat/byte that should be used when crafting the transaction.
+	SendOutputs(outputs []*wire.TxOut,
+		feeSatPerByte btcutil.Amount) (*chainhash.Hash, error)
 
 	// ListUnspentWitness returns all unspent outputs which are version 0
 	// witness programs. The 'confirms' parameter indicates the minimum