diff --git a/src/Avalonia.Styling/StyledElement.cs b/src/Avalonia.Styling/StyledElement.cs
index de8093c048..19bd17f123 100644
--- a/src/Avalonia.Styling/StyledElement.cs
+++ b/src/Avalonia.Styling/StyledElement.cs
@@ -288,7 +288,7 @@ namespace Avalonia
                     var list = new AvaloniaList<ILogical>
                     {
                         ResetBehavior = ResetBehavior.Remove,
-                        Validate = ValidateLogicalChild
+                        Validate = logical => ValidateLogicalChild(logical)
                     };
                     list.CollectionChanged += LogicalChildrenCollectionChanged;
                     _logicalChildren = list;
diff --git a/src/Avalonia.Visuals/Visual.cs b/src/Avalonia.Visuals/Visual.cs
index f4306d3929..7ecd6b8171 100644
--- a/src/Avalonia.Visuals/Visual.cs
+++ b/src/Avalonia.Visuals/Visual.cs
@@ -121,7 +121,7 @@ namespace Avalonia
         {
             var visualChildren = new AvaloniaList<IVisual>();
             visualChildren.ResetBehavior = ResetBehavior.Remove;
-            visualChildren.Validate = ValidateVisualChild;
+            visualChildren.Validate = visual => ValidateVisualChild(visual);
             visualChildren.CollectionChanged += VisualChildrenChanged;
             VisualChildren = visualChildren;
         }