diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
index a46f72d..0502886 100644
--- a/src/MainWindow.cpp
+++ b/src/MainWindow.cpp
@@ -140,8 +140,10 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     connect(m_appController, &ApplicationController::sketchModeEnded, m_viewport, &ViewportWidget::onSketchModeEnded);
     connect(m_appController, &ApplicationController::currentFileChanged, this, &MainWindow::updateWindowTitle);
     connect(m_appController, &ApplicationController::activeToolChanged, m_viewport, &ViewportWidget::onActiveToolChanged);
+    connect(m_appController, &ApplicationController::planeSelectionModeStarted, m_viewport, &ViewportWidget::onPlaneSelectionModeStarted);
 
     connect(m_viewport, &ViewportWidget::lineAdded, m_appController, &ApplicationController::addLine);
+    connect(m_viewport, &ViewportWidget::planeSelected, m_appController, &ApplicationController::onPlaneSelected);
 
     updateWindowTitle(QString());
 }