diff --git a/src/qt/modaloverlay.cpp b/src/qt/modaloverlay.cpp
--- a/src/qt/modaloverlay.cpp
+++ b/src/qt/modaloverlay.cpp
@@ -15,7 +15,8 @@
     : QWidget(parent), ui(new Ui::ModalOverlay), bestHeaderHeight(0),
       bestHeaderDate(QDateTime()), layerIsVisible(false), userClosed(false) {
     ui->setupUi(this);
-    connect(ui->closeButton, SIGNAL(clicked()), this, SLOT(closeClicked()));
+    connect(ui->closeButton, &QPushButton::clicked, this,
+            &ModalOverlay::closeClicked);
     if (parent) {
         parent->installEventFilter(this);
         raise();