diff --git a/README.md b/README.md
index 8fbab06..0bf4e76 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ It is highly recommended that you install the following mods, too:
 For large servers with many player `lsqlite3` is recommended.
 The package has to be installed via [luarocks](https://luarocks.org/):
 
-    luarocks install lsqlite3
+    luarocks  --lua-version 5.1 install lsqlite3
 
 To enable this `unsafe` package, add 'techage' to the list of trusted mods in minetest.conf:
 
diff --git a/basis/nodedata_meta.lua b/basis/nodedata_meta.lua
index 875ce6d..7141a41 100644
--- a/basis/nodedata_meta.lua
+++ b/basis/nodedata_meta.lua
@@ -65,6 +65,7 @@ function api.store_mapblock_data(key, mapblock_data)
 			if pos then
 				item._POS_ = nil
 				local data = serialize(item)
+				item._POS_ = pos
 				local meta = M(pos)
 				meta:set_string("ta_data", data)
 				meta:mark_as_private("ta_data")
diff --git a/coal_power_station/firebox.lua b/coal_power_station/firebox.lua
index 1b732cd..ebf716f 100644
--- a/coal_power_station/firebox.lua
+++ b/coal_power_station/firebox.lua
@@ -86,7 +86,7 @@ minetest.register_node("techage:coalfirebox", {
 
 	after_place_node = function(pos, placer)
 		if firebox.is_free_position(pos, placer:get_player_name()) then
-			techage.add_node(pos, "techage:coalfirebox")
+			techage.add_node(pos, "techage:coalfirebox", true)
 			local nvm = techage.get_nvm(pos)
 			nvm.running = false
 			nvm.burn_cycles = 0
diff --git a/coal_power_station/oilfirebox.lua b/coal_power_station/oilfirebox.lua
index b2cc309..7fd7ad2 100644
--- a/coal_power_station/oilfirebox.lua
+++ b/coal_power_station/oilfirebox.lua
@@ -88,7 +88,7 @@ minetest.register_node("techage:oilfirebox", {
 
 	after_place_node = function(pos, placer)
 		if firebox.is_free_position(pos, placer:get_player_name()) then
-			techage.add_node(pos, "techage:oilfirebox")
+			techage.add_node(pos, "techage:oilfirebox", true)
 			local nvm = techage.get_nvm(pos)
 			nvm.running = false
 			nvm.burn_cycles = 0
diff --git a/furnace/firebox.lua b/furnace/firebox.lua
index e3678db..03483bb 100644
--- a/furnace/firebox.lua
+++ b/furnace/firebox.lua
@@ -105,7 +105,7 @@ minetest.register_node("techage:furnace_firebox", {
 
 	on_construct = function(pos)
 		local nvm = techage.get_nvm(pos)
-		techage.add_node(pos, "techage:furnace_firebox")
+		techage.add_node(pos, "techage:furnace_firebox", true)
 		nvm.running = false
 		nvm.burn_cycles = 0
 		nvm.liquid = {}