1 files changed, 6 insertions, 6 deletions
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index 0a5b21f997..e1fb4819f1 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -33,9 +33,9 @@
 
 
 WalletModel::WalletModel(std::unique_ptr<interfaces::Wallet> wallet, interfaces::Node& node, const PlatformStyle *platformStyle, OptionsModel *_optionsModel, QObject *parent) :
-    QObject(parent), m_wallet(std::move(wallet)), m_node(node), optionsModel(_optionsModel), addressTableModel(0),
-    transactionTableModel(0),
-    recentRequestsTableModel(0),
+    QObject(parent), m_wallet(std::move(wallet)), m_node(node), optionsModel(_optionsModel), addressTableModel(nullptr),
+    transactionTableModel(nullptr),
+    recentRequestsTableModel(nullptr),
     cachedEncryptionStatus(Unencrypted),
     cachedNumBlocks(0)
 {
@@ -510,7 +510,7 @@ bool WalletModel::bumpFee(uint256 hash, uint256& new_hash)
     CAmount new_fee;
     CMutableTransaction mtx;
     if (!m_wallet->createBumpTransaction(hash, coin_control, 0 /* totalFee */, errors, old_fee, new_fee, mtx)) {
-        QMessageBox::critical(0, tr("Fee bump error"), tr("Increasing transaction fee failed") + "<br />(" +
+        QMessageBox::critical(nullptr, tr("Fee bump error"), tr("Increasing transaction fee failed") + "<br />(" +
             (errors.size() ? QString::fromStdString(errors[0]) : "") +")");
          return false;
     }
@@ -549,12 +549,12 @@ bool WalletModel::bumpFee(uint256 hash, uint256& new_hash)
 
     // sign bumped transaction
     if (!m_wallet->signBumpTransaction(mtx)) {
-        QMessageBox::critical(0, tr("Fee bump error"), tr("Can't sign transaction."));
+        QMessageBox::critical(nullptr, tr("Fee bump error"), tr("Can't sign transaction."));
         return false;
     }
     // commit the bumped transaction
     if(!m_wallet->commitBumpTransaction(hash, std::move(mtx), errors, new_hash)) {
-        QMessageBox::critical(0, tr("Fee bump error"), tr("Could not commit transaction") + "<br />(" +
+        QMessageBox::critical(nullptr, tr("Fee bump error"), tr("Could not commit transaction") + "<br />(" +
             QString::fromStdString(errors[0])+")");
          return false;
     }