diff --git a/src/Avalonia.Controls/Panel.cs b/src/Avalonia.Controls/Panel.cs
index eff6603727..4705b0e9a5 100644
--- a/src/Avalonia.Controls/Panel.cs
+++ b/src/Avalonia.Controls/Panel.cs
@@ -213,7 +213,7 @@ namespace Avalonia.Controls
         }
 
         /// <inheritdoc />
-        public bool TryGetTotalCount(out int count)
+        bool IChildIndexProvider.TryGetTotalCount(out int count)
         {
             count = Children.Count;
             return true;