diff --git a/src/Avalonia.Controls/Notifications/NotificationCard.cs b/src/Avalonia.Controls/Notifications/NotificationCard.cs
index 705d40380e..7d5b6cc0ca 100644
--- a/src/Avalonia.Controls/Notifications/NotificationCard.cs
+++ b/src/Avalonia.Controls/Notifications/NotificationCard.cs
@@ -39,7 +39,7 @@ namespace Avalonia.Controls.Notifications
             this.GetObservable(ContentProperty)
                 .Subscribe(x =>
                 {
-                    if (x is Notification notification)
+                    if (x is INotification notification)
                     {
                         switch (notification.Type)
                         {