diff --git a/src/Microsoft.AspNet.Antiforgery/ServiceCollectionExtensions.cs b/src/Microsoft.AspNet.Antiforgery/ServiceCollectionExtensions.cs
index 34db9b5026..297a76a36d 100644
--- a/src/Microsoft.AspNet.Antiforgery/ServiceCollectionExtensions.cs
+++ b/src/Microsoft.AspNet.Antiforgery/ServiceCollectionExtensions.cs
@@ -3,6 +3,7 @@
 
 using System;
 using Microsoft.AspNet.Antiforgery;
+using Microsoft.Framework.DependencyInjection.Extensions;
 using Microsoft.Framework.Internal;
 using Microsoft.Framework.OptionsModel;