CC recipients sent as BCC

I've just started using this module and CC emails do not seem to be sent.

Relevant Block - smtp.module lines 480-494

      case 'cc':
        $ccrecipients = split(',', $value);
        foreach ($ccrecipients as $ccrecipient) {
          if (strpos($ccrecipient, '<') !== FALSE) {
            $ccparts = explode(' <', $ccrecipient);
            $ccname = $ccparts[0];
            $ccaddr = rtrim($ccparts[1], '>');
          }
          else {
            $ccname = '';
            $ccaddr = $ccrecipient;
          }
          $mail->AddBCC($ccaddr, $ccname);
        }
        break;

Basically the issue is that for CC this line is used
$mail->AddBCC($ccaddr, $ccname);
when the line
$mail->AddCC($ccaddr, $ccname);
should be used