if minetest.get_modpath("mesecons") ~= nil then
    minetest.after(0, function()
        minetest.debug("[tnt_debug] ---")
        minetest.debug("[tnt_debug] registger mesecon function")

        mesecon:register_on_signal_on(function(pos, node)
            minetest.debug("[tnt_debug] register_on_signal_on()")
            if node.name == "tnt:tnt" then
                minetest.debug("[tnt_debug] BOOM!")
                minetest.env:set_node(pos, {name="tnt:tnt_burning"})
                boom(pos, 1)
            end
        end)

    end)
end