diff --git a/MapControl/Shared/EquirectangularProjection.cs b/MapControl/Shared/EquirectangularProjection.cs
index 7e85f1b2..6a9faf0b 100644
--- a/MapControl/Shared/EquirectangularProjection.cs
+++ b/MapControl/Shared/EquirectangularProjection.cs
@@ -4,7 +4,9 @@
 
 using System;
 using System.Globalization;
-#if !WINDOWS_UWP
+#if WINDOWS_UWP
+using Windows.Foundation;
+#else
 using System.Windows;
 #endif