nginx err_too_many_redirects lorsque j'essaie de rediriger vers https

In /etc/nginx/sites-available/yourconfig
Below the server_name 
server {
  server_name mydomain.com www.mydomain.com;
  if ($scheme = "http") {
      return 301 https://$server_name$request_uri;
  }
}
Sergiu The Man