diff --git a/src/MusicStore/StartupNtlmAuthentication.cs b/src/MusicStore/StartupNtlmAuthentication.cs
index ed399b4773..54bab90eff 100644
--- a/src/MusicStore/StartupNtlmAuthentication.cs
+++ b/src/MusicStore/StartupNtlmAuthentication.cs
@@ -45,11 +45,12 @@ namespace MusicStore
                 //Who will get admin access? For demo sake I'm listing the currently logged on user as the application administrator. But this can be changed to suit the needs.
                 var identity = (ClaimsIdentity)context.User.Identity;
 
+#if NET451
                 if (identity.GetUserName() == Environment.UserDomainName + "\\" + Environment.UserName)
                 {
                     identity.AddClaim(new Claim("ManageStore", "Allowed"));
                 }
-
+#endif
                 await next.Invoke();
             });