diff --git a/src/ui/MainWindow.cc b/src/ui/MainWindow.cc
index fb5263aa3544d9db6c207c62df7f115e402e63ad..259a7fc7d4d776447aa588f53de2692296e7528f 100644
--- a/src/ui/MainWindow.cc
+++ b/src/ui/MainWindow.cc
@@ -136,7 +136,7 @@ MainWindow::MainWindow(QSplashScreen* splashScreen, enum MainWindow::CUSTOM_MODE
     this->setAttribute(Qt::WA_DeleteOnClose);
     connect(menuActionHelper, SIGNAL(needToShowDockWidget(QString,bool)),SLOT(showDockWidget(QString,bool)));
     
-    connect(mavlink, SIGNAL(protocolStatusMessage(const QString&, const QString&)), this, SIGNAL(showCriticalMessage(const QString&, const QString&)));
+    connect(mavlink, SIGNAL(protocolStatusMessage(const QString&, const QString&)), this, SLOT(showCriticalMessage(const QString&, const QString&)));
     connect(mavlink, &MAVLinkProtocol::saveTempFlightDataLog, this, &MainWindow::_saveTempFlightDataLog);
     
     loadSettings();