diff --git a/mesecons_fpga/init.lua b/mesecons_fpga/init.lua
index 7ac650b..7781507 100644
--- a/mesecons_fpga/init.lua
+++ b/mesecons_fpga/init.lua
@@ -152,8 +152,7 @@ plg.register_nodes({
 				end
 			end
 		end
-		local is = lcore.serialize(instr)
-		meta:set_string("instr", is)
+		meta:set_string("instr", lcore.serialize(instr))
 		plg.update_formspec(pos, instr)
 		return true
 	end,