Error: Class 'FieldStorageConfig' not found in field_purge_batch() (line 92 of drupal8/html/core/modules/field/field.purge.inc).

Error: Class 'FieldStorageConfig' not found in field_purge_batch() (line 92 of drupal8/html/core/modules/field/field.purge.inc).

I get the above error when I run drush cron

I added

use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;

to the top of drupal/html/core/modules/field/field.purge.inc