diff --git a/src/Umbraco.Web/UmbracoDefaultOwinStartup.cs b/src/Umbraco.Web/UmbracoDefaultOwinStartup.cs
index 61568e3cb8..a3b9dac101 100644
--- a/src/Umbraco.Web/UmbracoDefaultOwinStartup.cs
+++ b/src/Umbraco.Web/UmbracoDefaultOwinStartup.cs
@@ -46,7 +46,9 @@ namespace Umbraco.Web
         /// <param name="app"></param>
         protected virtual void ConfigureMiddleware(IAppBuilder app)
         {
-            // Configure OWIN for authentication. 
+            // Configure OWIN for authentication.
+            ConfigureUmbracoAuthentication(app);
+
             app
                 .UseSignalR()
                 .FinalizeMiddlewareConfiguration();