diff --git a/src/Avalonia.Layout/Properties/AssemblyInfo.cs b/src/Avalonia.Layout/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000000..70fc1e9330
--- /dev/null
+++ b/src/Avalonia.Layout/Properties/AssemblyInfo.cs
@@ -0,0 +1,6 @@
+// Copyright (c) The Avalonia Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using Avalonia.Metadata;
+
+[assembly: XmlnsDefinition("https://github.com/avaloniaui", "Avalonia.Layout")]