Maintaining own custom subscriptions requires "administer user" privileges

Users without 'administer users' privileges will be unable to maintain custom defined subscriptions on their profile page. The corresponding tab will be empty. To fix this, a simple edit is required:
Row 139 in function notifications_custom_user_form of notifications_custom.module reads

if ($subs->visibility || user_access('administer users')) {

it should read

if ($subs->visibility || user_access('manage own subscriptions')) {

Hope I am not misinterpreting the relevant code.. Best,
John