diff --git a/src/Ursa/Controls/Resizers/WindowResizerThumb.cs b/src/Ursa/Controls/Resizers/WindowResizerThumb.cs
index 480da62..69a2189 100644
--- a/src/Ursa/Controls/Resizers/WindowResizerThumb.cs
+++ b/src/Ursa/Controls/Resizers/WindowResizerThumb.cs
@@ -28,6 +28,8 @@ public class WindowResizerThumb: Thumb
     {
         base.OnPointerPressed(e);
         if (_window is null || !_window.CanResize) return;
+        // TODO: Support touch screen resizing but we don't know what it should behave. 
+        if (!e.GetCurrentPoint(this).Properties.IsLeftButtonPressed) return;
         var windowEdge = ResizeDirection switch
         {
             ResizeDirection.Top => WindowEdge.North,