undefined constant in usps module

Not sure if this belongs here or in the shipping module section.

Running 1.56b, received this warning/error:

[12-Aug-2019 10:44:32 America/New_York] Request URI: /index.php?main_page=checkout_shipping, IP address: xxxx
#1  usps->quote() called at [/usr/www/users/xxx/includes/classes/shipping.php:169]
#2  shipping->quote() called at [/usr/www/users/xxx/includes/modules/pages/checkout_shipping/header_php.php:187]
#3  require(/usr/www/users/xxx/includes/modules/pages/checkout_shipping/header_php.php) called at [/usr/www/users/xxx/index.php:36]
--> PHP Warning: Use of undefined constant MODULE_SHIPPING_USPS_REGULATIONS - assumed 'MODULE_SHIPPING_USPS_REGULATIONS' (this will throw an Error in a future version of PHP) in /usr/www/users/xxx/includes/modules/shipping/usps.php on line 351.

thanks,
Ed

Hopefully this will be properly fixed in the next version of the USPS module, but for now change includes/modules/shipping/usps.php line 351 from

    if (MODULE_SHIPPING_USPS_REGULATIONS == 'True') {

to

    if (defined('MODULE_SHIPPING_USPS_REGULATIONS') && MODULE_SHIPPING_USPS_REGULATIONS == 'True') {

Thank you for the fast response. Fix applied.