diff --git a/conf/scgi_params b/conf/scgi_params
index 257167e..47348ca 100644
--- a/conf/scgi_params
+++ b/conf/scgi_params
@@ -8,6 +8,7 @@
 scgi_param  DOCUMENT_ROOT      $document_root;
 scgi_param  SCGI               1;
 scgi_param  SERVER_PROTOCOL    $server_protocol;
+scgi_param  HTTPS              $https if_not_empty;
 
 scgi_param  REMOTE_ADDR        $remote_addr;
 scgi_param  REMOTE_PORT        $remote_port;