diff --git a/samples/Mvc.Server/Startup.cs b/samples/Mvc.Server/Startup.cs
index e79b4ba6..b0aef8ec 100644
--- a/samples/Mvc.Server/Startup.cs
+++ b/samples/Mvc.Server/Startup.cs
@@ -122,8 +122,6 @@ namespace Mvc.Server {
 
             app.UseSession();
 
-            app.UseSession();
-
             app.UseOpenIddict();
 
             app.UseMvcWithDefaultRoute();