addHook("ThinkFrame", function()
    for player in players.iterate do
        if player and player.mo and player.mo.valid then
            local skin = skins[player.mo.skin]
            if skin and (skin.flags & SF_MACHINE) then
                -- Immune to drowning
                if player.powers[pw_underwater] then
                    player.powers[pw_underwater] = 100
                end

                -- Immune to suffocation in space
                if player.powers[pw_spacetime] then
                    player.powers[pw_spacetime] = 100
                end
            end
        end
    end
end)