dnsmasq - How to generate correct VO?

Question

For some reasons I've decided to replace isc-dhcpd with dnsmasq. I use it to receive an IP address on my STB.

Here's a part of isc-dhcpd config

option space DIB;
    option DIB.address  code 1 = ip-address;
    option DIB.port     code 2 = integer 16;
    option DIB.fw_ver   code 3 = text;
    option DIB.ui_ver   code 4 = text;

class "DIB-120"
{
    match if (option vendor-class-identifier="DIB120");
            vendor-option-space DIB;
            option DIB.address 239.1.1.1;
            option DIB.port 1234;
}

And here's DHCP Reply:

01:33:52.000704 IP (tos 0x10, ttl  16, id 0, offset 0, flags [none], proto: UDP (17), length: 328) ivis.bootps > 10.222.0.66.bootpc                                    : [udp sum ok] BOOTP/DHCP, Reply, length: 300, xid:0xd21c430c, secs:10, flags: [none] (0x0000)
      Your IP: 10.222.0.66
      Client Ethernet Address: 00:22:b0:6f:f9:88 (oui Unknown)
      Vendor-rfc1048:
        DHCP:OFFER
        SID:ivis
        LT:76800
        SM:255.255.255.128
        DG:10.222.0.1
        NS:ns0.blablabla.com,ns1.blablabla.com
        NTP:time.blablabla.com
        VO:1.4.239.1.1.1.2.2.4.210

I just don't understand how to config dnsmasq to make him return VO:1.4.239.1.1.1.2.2.4.210

If i write something like:

    dhcp-option=vendor:DIB120,2,04:D2
    dhcp-option=vendor:DIB120,1,EF:01:01:01

it will return VO:1.4.239.1.1.1.2.2.4.210.255

I've spent several hours RTFM, but couldn't understand that. =(