Modul to Turret

[NecoAngelus]

Hello guys,

i am new in Modding Factorio.

i have create a mod for 0.11 and it work fine.
But now i wont make it better and will not create multiple turrets.
my wish is to add Modulslots Ammoturrets
i add this line:

module_specification =
{
module_slots = 2
},
allowed_effects = {"attacking_speed", "damage_modifier", "range"},

Factorio start without error but there is no Modul Slot.

Can someone help me

[Xyfi]

My easiest guess would be that turrets don't support modules at the moment, only certain entities support modules.