diff --git a/Software/PC_Application/appwindow.cpp b/Software/PC_Application/appwindow.cpp
index 4161e04..845584c 100644
--- a/Software/PC_Application/appwindow.cpp
+++ b/Software/PC_Application/appwindow.cpp
@@ -227,7 +227,9 @@ AppWindow::AppWindow(QWidget *parent)
         // acquisition frequencies may have changed, update
         UpdateAcquisitionFrequencies();
 
-        active->initializeDevice();
+        if(device) {
+            active->initializeDevice();
+        }
     });
 
     connect(ui->actionAbout, &QAction::triggered, [=](){