WSOD when magento_cart enabled, but magento_customer not enabled

Call to undefined function magento_customers_update_magento_customer()"
/modules/magento/modules/magento_cart/magento_cart.module" line: 324

Code called from magento_cart_user hook. So after logging in, I get a WSOD.

Need to update the info file's (magento_cart.info) dependencies part and/or check that module is exists.