Disable tcp MSS option in three way handshake?

Hi,

this sounds crazy, we have a weird situation that an unknown tcp
implementation not putting tcp MSS option in the SYN/ACK which caused
us some issue. I am tasked to mimic the unknown tcp immplementation on
not sending MSS in tcp SYN/ACK, I am wondering if I can achieve that
by modifying linux kernel tcp code,  there is socket option
TCP_MAXSEG, but that seems only affecting the size of MSS, not
removing the MSS option. do you have any pointer on how to do that in
kernel tcp code?

Thanks

Vincent