diff --git a/commands.lua b/commands.lua
index 88ea469..8647324 100644
--- a/commands.lua
+++ b/commands.lua
@@ -174,7 +174,7 @@ basic_robot.commands.take_item = function(name,item, inventory,dir)
 	inv:add_item("main",stack);
 	tinv:remove_item(inventory, stack);
 
-	return contains
+	return true
 end
 
 basic_robot.commands.check_inventory = function(name,itemname, inventory,dir)
diff --git a/init.lua b/init.lua
index 36e1610..a20666c 100644
--- a/init.lua
+++ b/init.lua
@@ -776,6 +776,7 @@ minetest.register_entity("basic_robot:robot",{
 
 
 local spawn_robot = function(pos,node,ttl)
+	if type(ttl) ~= "number" then ttl = 0 end
 	if ttl<0 then return end
 	
 	local meta = minetest.get_meta(pos);