How do I force OSX to use IGMP version 2?

I am connected to an old NETGEAR smart-switch which only supports IGMPv2. It doesnt route multicast traffic to my mac because it joins the group using IGMPv3.

I tried this:

sysctl net.inet.igmp.default_version=2

but it doesn't work - OSX still sends out IGMPv3 packets (confirmed with wireshark).

Is there a way of forcing IGMPv2?

Im using Yosemite (10.10.2), in case that makes a difference.