Call to undefined method CI_DB_mysql_driver::row()

[eluser]Bramme[/eluser]
Okay, I've probably been staring too long at my screen and I just can't see it, but what's wrong with this?

Code:

function edit($tutID = NULL) {
    if ( ! isset($tutID) OR ! is_numeric($tutID)) {
        redirect('/admin/tutorial/overview');
    }
    $this->db->where('tutId', $tutID);
    $query = $this->db->select('tutorial');
    $data['data'] = $query->row();
}

I get the error mentioned in the title...