diff --git a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/EventsPageViewModel.cs b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/EventsPageViewModel.cs
index fffc04eed7..dd85fcf14c 100644
--- a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/EventsPageViewModel.cs
+++ b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/EventsPageViewModel.cs
@@ -12,7 +12,7 @@ namespace Avalonia.Diagnostics.ViewModels
 {
     internal class EventsPageViewModel : ViewModelBase
     {
-        private static readonly HashSet<RoutedEvent> s_defaultEvents = new()
+        private static readonly HashSet<RoutedEvent> s_defaultEvents = new HashSet<RoutedEvent>()
         {
             Button.ClickEvent,
             InputElement.KeyDownEvent,