diff --git a/src/Microsoft.AspNet.Mvc/BuilderExtensions.cs b/src/Microsoft.AspNet.Mvc/BuilderExtensions.cs
index 851e41ec31..f299040ff3 100644
--- a/src/Microsoft.AspNet.Mvc/BuilderExtensions.cs
+++ b/src/Microsoft.AspNet.Mvc/BuilderExtensions.cs
@@ -12,10 +12,10 @@ namespace Microsoft.AspNet
         {
             return app.UseMvc(routes =>
             {
-                routes.MapRoute("{area}/{controller}/{action}", new { controller = "Home", action = "Index" });
-                routes.MapRoute("{area}/{controller}", new { controller = "Home" });
-                routes.MapRoute("{controller}/{action}", new { controller = "Home", action = "Index" });
-                routes.MapRoute("{controller}", new { controller = "Home" });
+                routes.MapRoute(null, "{area}/{controller}/{action}", new { controller = "Home", action = "Index" });
+                routes.MapRoute(null, "{area}/{controller}", new { controller = "Home" });
+                routes.MapRoute(null, "{controller}/{action}", new { controller = "Home", action = "Index" });
+                routes.MapRoute(null, "{controller}", new { controller = "Home" });
             });
         }