diff --git a/advtrains_luaautomation/environment.lua b/advtrains_luaautomation/environment.lua
index 63aa68d..e93b9c3 100644
--- a/advtrains_luaautomation/environment.lua
+++ b/advtrains_luaautomation/environment.lua
@@ -150,7 +150,7 @@ local static_env = {
 	--interrupts are handled per node, position unknown. (same goes for digilines)
 	--however external interrupts can be set here.
 	interrupt_pos = function(parpos, imesg)
-		local pos=atlatc.pcnaming.resolve_pos(parpos)
+		local pos=atlatc.pcnaming.resolve_pos(parpos, "interrupt_pos")
 		atlatc.interrupt.add(0, pos, {type="ext_int", ext_int=true, message=imesg})
 	end,
 	-- sends an atc command to train regardless of where it is in the world
diff --git a/advtrains_luaautomation/pcnaming.lua b/advtrains_luaautomation/pcnaming.lua
index ebb769f..71f4d9a 100644
--- a/advtrains_luaautomation/pcnaming.lua
+++ b/advtrains_luaautomation/pcnaming.lua
@@ -44,7 +44,12 @@ minetest.register_craftitem("advtrains_luaautomation:pcnaming",{
 				return
 			end
 			local node = advtrains.ndb.get_node(pos)
-			if node.name and (minetest.get_item_group(node.name, "advtrains_signal")>0 or advtrains.is_passive(pos)) then
+			local ndef = minetest.registered_nodes[node.name]
+			if node.name and (
+					minetest.get_item_group(node.name, "advtrains_signal")>0 --is IL signal
+					or advtrains.is_passive(pos) -- is passive component
+					or (ndef and ndef.luaautomation) -- is active component
+					) then
 				--look if this one already has a name
 				local pn=""
 				for name, npos in pairs(atlatc.pcnaming.name_map) do