diff --git a/src/Markup/Avalonia.Markup.Xaml/XamlIl/CompilerExtensions/XamlIlAvaloniaPropertyHelper.cs b/src/Markup/Avalonia.Markup.Xaml/XamlIl/CompilerExtensions/XamlIlAvaloniaPropertyHelper.cs
index 106541ec5c..452bb05132 100644
--- a/src/Markup/Avalonia.Markup.Xaml/XamlIl/CompilerExtensions/XamlIlAvaloniaPropertyHelper.cs
+++ b/src/Markup/Avalonia.Markup.Xaml/XamlIl/CompilerExtensions/XamlIlAvaloniaPropertyHelper.cs
@@ -133,7 +133,7 @@ namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions
 
             public PropertySetterBinderParameters BinderParameters { get; } = new PropertySetterBinderParameters
             {
-                AllowNull = false
+                AllowXNull = false
             };
 
             public IReadOnlyList<IXamlIlType> Parameters { get; set; }
diff --git a/src/Markup/Avalonia.Markup.Xaml/XamlIl/xamlil.github b/src/Markup/Avalonia.Markup.Xaml/XamlIl/xamlil.github
index 56c401c48f..bbb8d66e38 160000
--- a/src/Markup/Avalonia.Markup.Xaml/XamlIl/xamlil.github
+++ b/src/Markup/Avalonia.Markup.Xaml/XamlIl/xamlil.github
@@ -1 +1 @@
-Subproject commit 56c401c48f51979201ad810c96a9644705d4ddd9
+Subproject commit bbb8d66e3884e52bdf5385e44caee1e31c942ec1