diff --git a/src/Wpf.Ui.Tray/Controls/NotifyIcon.cs b/src/Wpf.Ui.Tray/Controls/NotifyIcon.cs
index e99643035..32f1b2a6e 100644
--- a/src/Wpf.Ui.Tray/Controls/NotifyIcon.cs
+++ b/src/Wpf.Ui.Tray/Controls/NotifyIcon.cs
@@ -385,7 +385,6 @@ private static void OnTooltipTextChanged(DependencyObject d, DependencyPropertyC
             return;
         }
 
-        notifyIcon.TooltipText = e.NewValue as string ?? string.Empty;
         notifyIcon.internalNotifyIconManager.TooltipText = notifyIcon.TooltipText;
         _ = notifyIcon.internalNotifyIconManager.ModifyToolTip();
     }