diff --git a/README.txt b/README.txt
index 047d8e2..f868835 100644
--- a/README.txt
+++ b/README.txt
@@ -1,10 +1,10 @@
 Minetest mod "Pyramids"
 =======================
-version: 0.4 Beta
+version: 0.4.1 Beta
 
 License of source code and textures: WTFPL
 ------------------------------------------
-(c) Copyright BlockMen (2013)
+(c) Copyright BlockMen (2013 - 2015)
 
 
 License of mesh model: WTFPL
@@ -40,4 +40,4 @@ Using the mod:
 --------------
 
 This mod adds randomly spawned pyramids in deserts. The pyramids are very rare and contain a chest with stuff.
-Also there are mummys inside, which attack the player if found in their radius.
\ No newline at end of file
+Also there are mummys inside, which attack the player if found in their radius.
diff --git a/nodes.lua b/nodes.lua
index fd663ce..9afba6b 100644
--- a/nodes.lua
+++ b/nodes.lua
@@ -15,9 +15,11 @@ trap_on_timer = function (pos, elapsed)
 	for i, obj in pairs(objs) do
 		if obj:is_player() then
 			local n = minetest.get_node(pos)
-			if n and n.name and minetest.registered_nodes[n.name].crack < 2 then
-				minetest.set_node(pos, {name="pyramids:trap_2"})
-				nodeupdate(pos)
+			if n and n.name then
+				if minetest.registered_nodes[n.name].crack and minetest.registered_nodes[n.name].crack < 2 then
+					minetest.set_node(pos, {name="pyramids:trap_2"})
+					nodeupdate(pos)
+				end
 			end
 		end
 	end