diff --git a/src/Calculator/App.xaml.cs b/src/Calculator/App.xaml.cs
index 4f8af2c1..bd075bdf 100644
--- a/src/Calculator/App.xaml.cs
+++ b/src/Calculator/App.xaml.cs
@@ -19,7 +19,6 @@ using Windows.ApplicationModel.Activation;
 using Windows.ApplicationModel.Core;
 using Windows.Foundation;
 using Windows.Storage;
-using Windows.System;
 using Windows.UI.Core;
 using Windows.UI.StartScreen;
 using Windows.UI.ViewManagement;