masquerade_update_7000() is broken

Upgrading from Masquerade 6.x to the latest 7.x, I get the following error when upgrading the database:

WD php: Recoverable fatal error: Argument 2 passed to db_update() must be an array, string given, called in                                   [error]
/var/www/sites/all/modules/masquerade/masquerade.install on line 184 and defined in db_update() (line 2330 of
/var/www/includes/database/database.inc).
Drush command terminated abnormally due to an unrecoverable error.                                                                            [error]
Recoverable fatal error: Argument 2 passed to db_update() must be an array, string given, called in /var/www/sites/all/modules/masquerade/masquerade.install on line 184 and defined in db_update() (line 2330 of /var/www/includes/database/database.inc).