One of two fields required

Hi.

Having a problem with settings one of two fileds to be required.
Our end user has to attach their CV as a file or write a short bio in textfield below. So at least one of this two is enough. This used to work with:

add_filter( 'wpcf7_validate', 'wpq_validate' );

function wpq_validate( $result ) {

    $form  = WPCF7_Submission::get_instance();
    $field1 = $form->get_posted_data('upload-file-920');
    $field2 = $form->get_posted_data('your-message');

    if(  empty($field1) && empty($field2) ) {
        $result->invalidate('upload-file-920', 'Fill at least one.' );
        $result->invalidate('your-message', 'Fill at least one.' );
    } 
return $result; 
}

But now, this is not working anymore. If only one is given it does not let you through. Thoughts?