Undefined variable: wpac_options

I’m getting this PHP notice on every page load:

Undefined variable: wpac_options wp-content/plugins/wp-ajaxify-comments/wp-ajaxify-comments.php:470

Looks like it’s coming from the random variable before this function:

$wpac_options;
function wpac_load_options() {

It doesn’t look like that instance of $wpac_options is doing anything so can it be removed? I’ve commented it out for now, but it would be nice if I didn’t have to do that after every update.