diff --git a/technic/machines/other/injector.lua b/technic/machines/other/injector.lua
index 886e0599e..c5770911f 100644
--- a/technic/machines/other/injector.lua
+++ b/technic/machines/other/injector.lua
@@ -6,7 +6,7 @@ local fs_helpers = pipeworks.fs_helpers
 local tube_entry = "^pipeworks_tube_connection_metallic.png"
 
 local function inject_items (pos)
-		local meta=minetest.get_meta(pos) 
+		local meta=minetest.get_meta(pos)
 		local inv = meta:get_inventory()
 		local mode=meta:get_string("mode")
 		if mode=="single items" then
@@ -15,7 +15,7 @@ local function inject_items (pos)
 			i=i+1
 				if stack then
 				local item0=stack:to_table()
-				if item0 then 
+				if item0 then
 					item0["count"] = "1"
 					technic.tube_inject_item(pos, pos, vector.new(0, -1, 0), item0)
 					stack:take_item(1)
@@ -31,7 +31,7 @@ local function inject_items (pos)
 			i=i+1
 				if stack then
 				local item0=stack:to_table()
-				if item0 then 
+				if item0 then
 					technic.tube_inject_item(pos, pos, vector.new(0, -1, 0), item0)
 					stack:clear()
 					inv:set_stack("main", i, stack)
@@ -40,7 +40,7 @@ local function inject_items (pos)
 				end
 			end
 		end
-		
+
 end
 
 minetest.register_craft({
@@ -119,6 +119,7 @@ minetest.register_node("technic:injector", {
 		return inv:is_empty("main")
 	end,
 	on_receive_fields = function(pos, formanme, fields, sender)
+		if not pipeworks.may_configure(pos, sender) then return end
 		local meta = minetest.get_meta(pos)
 		if fields.mode_item then meta:set_string("mode", "single items") end
 		if fields.mode_stack then meta:set_string("mode", "whole stacks") end
@@ -132,7 +133,7 @@ minetest.register_node("technic:injector", {
 	end,
 	on_timer = function(pos)
 		local pos1 = vector.add(pos, vector.new(0, -1, 0))
-		local node1 = minetest.get_node(pos1) 
+		local node1 = minetest.get_node(pos1)
 		if minetest.get_item_group(node1.name, "tubedevice") > 0 then
 			inject_items(pos)
 		end