diff --git a/src/Avalonia.Controls/Avalonia.Controls.csproj b/src/Avalonia.Controls/Avalonia.Controls.csproj
index fddd4403e9..b3bf7d06cc 100644
--- a/src/Avalonia.Controls/Avalonia.Controls.csproj
+++ b/src/Avalonia.Controls/Avalonia.Controls.csproj
@@ -12,6 +12,7 @@
     <ProjectReference Include="..\Avalonia.Remote.Protocol\Avalonia.Remote.Protocol.csproj" />
     <ProjectReference Include="..\Avalonia.Visuals\Avalonia.Visuals.csproj" />
     <ProjectReference Include="..\Avalonia.Styling\Avalonia.Styling.csproj" />
+    <ProjectReference Include="..\Markup\Avalonia.Markup\Avalonia.Markup.csproj" />
   </ItemGroup>
   <Import Project="..\..\build\Rx.props" />
   <Import Project="..\..\build\JetBrains.Annotations.props" />
diff --git a/src/Avalonia.Controls/DataGrid/DataGridLength.cs b/src/Avalonia.Controls/DataGrid/DataGridLength.cs
index 3388fda27a..9380a19e32 100644
--- a/src/Avalonia.Controls/DataGrid/DataGridLength.cs
+++ b/src/Avalonia.Controls/DataGrid/DataGridLength.cs
@@ -7,6 +7,7 @@ using Avalonia.Utilities;
 using System;
 using System.ComponentModel;
 using System.Globalization;
+using Avalonia.Controls.Utils;
 
 namespace Avalonia.Controls
 {