diff --git a/src/Avalonia.Controls/TopLevel.cs b/src/Avalonia.Controls/TopLevel.cs
index fcdb80a7f7..1f76cb247c 100644
--- a/src/Avalonia.Controls/TopLevel.cs
+++ b/src/Avalonia.Controls/TopLevel.cs
@@ -286,7 +286,7 @@ namespace Avalonia.Controls
         IMouseDevice IInputRoot.MouseDevice => PlatformImpl?.MouseDevice;
 
         /// <inheritdoc/>
-        bool? IInputRoot.IsPlatformEnabled => PlatformImpl is IWindowImpl windowImpl? windowImpl.IsEnabled : (bool?)null;
+        bool? IInputRoot.IsPlatformEnabled => (PlatformImpl as IWindowImpl)?.IsEnabled;
 
         void IWeakSubscriber<ResourcesChangedEventArgs>.OnEvent(object sender, ResourcesChangedEventArgs e)
         {