diff --git a/src/qt/qvaluecombobox.cpp b/src/qt/qvaluecombobox.cpp
--- a/src/qt/qvaluecombobox.cpp
+++ b/src/qt/qvaluecombobox.cpp
@@ -6,8 +6,10 @@
 
 QValueComboBox::QValueComboBox(QWidget *parent)
     : QComboBox(parent), role(Qt::UserRole) {
-    connect(this, SIGNAL(currentIndexChanged(int)), this,
-            SLOT(handleSelectionChanged(int)));
+    connect(
+        this,
+        static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
+        this, &QValueComboBox::handleSelectionChanged);
 }
 
 QVariant QValueComboBox::value() const {