diff --git a/samples/CookieSample/Startup.cs b/samples/CookieSample/Startup.cs
index d648a15235..2a01fc0b26 100644
--- a/samples/CookieSample/Startup.cs
+++ b/samples/CookieSample/Startup.cs
@@ -1,5 +1,6 @@
 using System.Security.Claims;
 using Microsoft.AspNet.Builder;
+using Microsoft.AspNet.Http;
 using Microsoft.AspNet.Security.Cookies;
 
 namespace CookieSample