diff --git a/src/Avalonia.Controls/TreeViewItem.cs b/src/Avalonia.Controls/TreeViewItem.cs
index e185bc227b..c7fd96b68a 100644
--- a/src/Avalonia.Controls/TreeViewItem.cs
+++ b/src/Avalonia.Controls/TreeViewItem.cs
@@ -173,7 +173,7 @@ namespace Avalonia.Controls
         {
             var result = 0;
 
-            while (logical != null && logical.GetType() != typeof(T))
+            while (logical != null && !(logical is T))
             {
                 ++result;
                 logical = logical.LogicalParent;