Add header on custom error page

Hi,
i’m trying to add a ‘X-ua-compatible’ header on a custom 444 error
page like below. but this does not work. do you have any suggestions
on how to do this?

Any advise will be appreciated.

Thanks.

error_page 444 = @err_444;

location = /xxx {
return 444;
}

  location ~ \.php$ {
    try_files $uri =404;
    fastcgi_pass   unix:/var/run/php.sock;
    fastcgi_param  SCRIPT_FILENAME 

$document_root$fastcgi_script_name;
include /etc/nginx/fastcgi_params;
}

location @err_444 {
add_header X-ua-compatible ‘IE=EmulateIE8’;
rewrite ^ /index.php?url=err/444?;
}

add_header is effective only when the response code is equal to 200,
204, 301, 302 or 304. You should try headers_more module.

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,214931,214932#msg-214932