SRX345 management alarm

Hey guys,

I'm not using the management interface on my SRX345 cluster. There is a major alarm because the management interface is down. Normally, I'd use the following config to ignore the management alarm:

chassis {
    alarm {
        management-ethernet {
            link-down ignore;
        }
    }
}

However, this block is not supported in 15.1X49-D50.3:

{primary:node0}[edit]
root@NU-MDF-SRX345# show chassis
alarm {
    ##
    ## Warning: configuration block ignored: unsupported platform (srx345)
    ##
    management-ethernet {
        link-down ignore;
    }
}

What is the necessary config to ignore this alarm?