Declaration of FeedImportSQLHashes::__construct() must be compatible

Today I noticed an error message in my logfile pointing to Feed Import.

PHP Fatal error: Declaration of FeedImportSQLHashes::__construct() must be compatible with FeedImportHashManager::__construct($entity_name, $group, $feed_machine_name) in [..]/feed_import/feed_import_base/inc/feed_import.inc on line 1547

Changing the constructor declaration seems to get rid of the error.

-  public function __construct($entity_name, $feed_machine_name) {
+ public function __construct($entity_name, $group, $feed_machine_name) {
    $this->entity = $entity_name;
    $this->feedName = $feed_machine_name;
+ $this->group = $group;
  }

Am I missing something?