diff --git a/Toolkit.UI.Avalonia/Properties/Assembly.cs b/Toolkit.UI.Avalonia/Properties/Assembly.cs
new file mode 100644
index 0000000..eaaf8a8
--- /dev/null
+++ b/Toolkit.UI.Avalonia/Properties/Assembly.cs
@@ -0,0 +1,3 @@
+using Avalonia.Metadata;
+
+[assembly: XmlnsDefinition("https://github.com/avaloniaui", "Toolkit.UI.Avalonia")]
\ No newline at end of file