From 04802930d4e1f565b3c36e1a806fbe9cd4809937 Mon Sep 17 00:00:00 2001
From: Jonas Schnelli <dev@jonasschnelli.ch>
Date: Wed, 7 Sep 2016 16:03:08 +0200
Subject: [PATCH] [Qt][CoinControl] fix UI bug that could result in paying
 unexpected fee

---
 src/qt/sendcoinsdialog.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 3e96bb18c3..8433818a64 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -589,6 +589,9 @@ void SendCoinsDialog::updateGlobalFeeVariables()
     {
         nTxConfirmTarget = defaultConfirmTarget - ui->sliderSmartFee->value();
         payTxFee = CFeeRate(0);
+
+        // set nMinimumTotalFee to 0 to not accidentally pay a custom fee
+        CoinControlDialog::coinControl->nMinimumTotalFee = 0;
     }
     else
     {
@@ -781,7 +784,7 @@ void SendCoinsDialog::coinControlUpdateLabels()
         ui->radioCustomAtLeast->setVisible(true);
 
         // only enable the feature if inputs are selected
-        ui->radioCustomAtLeast->setEnabled(CoinControlDialog::coinControl->HasSelected());
+        ui->radioCustomAtLeast->setEnabled(ui->radioCustomFee->isChecked() && !ui->checkBoxMinimumFee->isChecked() &&CoinControlDialog::coinControl->HasSelected());
     }
     else
     {