diff --git a/src/MainWindow.cpp b/src/MainWindow.cpp
index e83b5ad..a2d09b0 100644
--- a/src/MainWindow.cpp
+++ b/src/MainWindow.cpp
@@ -146,6 +146,7 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     connect(m_appController, &ApplicationController::planeSelectionModeStarted, m_viewport, &ViewportWidget::onPlaneSelectionModeStarted);
 
     connect(m_viewport, &ViewportWidget::lineAdded, m_appController, &ApplicationController::addLine);
+    connect(m_viewport, &ViewportWidget::rectangleAdded, m_appController, &ApplicationController::addRectangle);
     connect(m_viewport, &ViewportWidget::planeSelected, m_appController, &ApplicationController::onPlaneSelected);
     connect(m_viewport, &ViewportWidget::toolDeactivated, m_appController, [this]() { m_appController->setActiveTool(ApplicationController::ToolType::None); });