diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -247,7 +247,7 @@
 }
 
 void BitcoinApplication::createSplashScreen(const NetworkStyle *networkStyle) {
-    SplashScreen *splash = new SplashScreen(m_node, nullptr, networkStyle);
+    SplashScreen *splash = new SplashScreen(m_node, networkStyle);
     // We don't hold a direct pointer to the splash screen after creation, but
     // the splash screen will take care of deleting itself when slotFinish
     // happens.
diff --git a/src/qt/splashscreen.h b/src/qt/splashscreen.h
--- a/src/qt/splashscreen.h
+++ b/src/qt/splashscreen.h
@@ -28,7 +28,7 @@
     Q_OBJECT
 
 public:
-    explicit SplashScreen(interfaces::Node &node, Qt::WindowFlags f,
+    explicit SplashScreen(interfaces::Node &node,
                           const NetworkStyle *networkStyle);
     ~SplashScreen();
 
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -27,9 +27,9 @@
 
 #include <memory>
 
-SplashScreen::SplashScreen(interfaces::Node &node, Qt::WindowFlags f,
+SplashScreen::SplashScreen(interfaces::Node &node,
                            const NetworkStyle *networkStyle)
-    : QWidget(nullptr, f), curAlignment(0), m_node(node) {
+    : QWidget(nullptr), curAlignment(0), m_node(node) {
     // set reference point, paddings
     int paddingRight = 50;
     int paddingTop = 50;
diff --git a/src/qt/utilitydialog.h b/src/qt/utilitydialog.h
--- a/src/qt/utilitydialog.h
+++ b/src/qt/utilitydialog.h
@@ -43,7 +43,7 @@
     Q_OBJECT
 
 public:
-    explicit ShutdownWindow(QWidget *parent = nullptr, Qt::WindowFlags f = 0);
+    explicit ShutdownWindow(QWidget *parent = nullptr);
     static QWidget *showShutdownWindow(BitcoinGUI *window);
 
 protected:
diff --git a/src/qt/utilitydialog.cpp b/src/qt/utilitydialog.cpp
--- a/src/qt/utilitydialog.cpp
+++ b/src/qt/utilitydialog.cpp
@@ -141,8 +141,7 @@
 }
 
 /** "Shutdown" window */
-ShutdownWindow::ShutdownWindow(QWidget *parent, Qt::WindowFlags f)
-    : QWidget(parent, f) {
+ShutdownWindow::ShutdownWindow(QWidget *parent) : QWidget(parent) {
     QVBoxLayout *layout = new QVBoxLayout();
     layout->addWidget(new QLabel(
         tr("%1 is shutting down...").arg(PACKAGE_NAME) + "<br /><br />" +