Geo Redirect HTTP/HTTPS

I have used Geo Redirect for redirecting visitors of my website coming through HTTP, which is just fine because I redirect from something like

http://xyz.com to http://xyz.com/en or whatever region fits

I think this does not work with HTTPS requests because

https://xyz.com is still redirected to http://xyz.com/en

How can I fix this to work for HTTP and HTTPS?

Thanks for any help, Paul