diff --git a/samples/RenderDemo/Controls/LineBoundsDemoControl.cs b/samples/RenderDemo/Controls/LineBoundsDemoControl.cs
index 0e0b3d6142..cc847a594d 100644
--- a/samples/RenderDemo/Controls/LineBoundsDemoControl.cs
+++ b/samples/RenderDemo/Controls/LineBoundsDemoControl.cs
@@ -17,7 +17,7 @@ namespace RenderDemo.Controls
         public LineBoundsDemoControl()
         {
             var timer = new DispatcherTimer();
-            timer.Interval = TimeSpan.FromSeconds(1 / 60);
+            timer.Interval = TimeSpan.FromSeconds(1 / 60.0);
             timer.Tick += (sender, e) => Angle += Math.PI / 360;
             timer.Start();
         }