diff --git a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
index 996cfdbc52..6f3dabd568 100644
--- a/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
+++ b/src/Markup/Avalonia.Markup.Xaml/Avalonia.Markup.Xaml.csproj
@@ -15,6 +15,7 @@
         <Compile Include="Converters\MemberSelectorTypeConverter.cs" />
         <Compile Include="Converters\TimeSpanTypeConverter.cs" />
         <Compile Include="Extensions.cs" />
+        <Compile Include="MarkupExtension.cs" />
         <Compile Include="MarkupExtensions\DynamicResourceExtension.cs" />
         <Compile Include="MarkupExtensions\ResourceInclude.cs" />
         <Compile Include="MarkupExtensions\StaticResourceExtension.cs" />
diff --git a/src/Markup/Avalonia.Markup.Xaml/MarkupExtension.cs b/src/Markup/Avalonia.Markup.Xaml/MarkupExtension.cs
new file mode 100644
index 0000000000..858f2daa58
--- /dev/null
+++ b/src/Markup/Avalonia.Markup.Xaml/MarkupExtension.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace Avalonia.Markup.Xaml
+{
+    public abstract class MarkupExtension
+    {
+        public abstract object ProvideValue(IServiceProvider serviceProvider);
+    }
+}