diff --git a/init.lua b/init.lua
index 375aaae..6cc0ae6 100644
--- a/init.lua
+++ b/init.lua
@@ -67,11 +67,13 @@ local function get_node_lvm(pos)
 	local param2_data = vm:get_param2_data()
 	local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
 	local idx = area:indexp(pos)
-	node = {
-		name = minetest.get_name_from_content_id(data[idx]),
-		param2 = param2_data[idx]
-	}
-	return node
+	if data[idx] and param2_data[idx] then
+		return {
+			name = minetest.get_name_from_content_id(data[idx]),
+			param2 = param2_data[idx]
+		}
+	end
+	return {name="ignore", param2=0}
 end
 
 local function turnright(dir)