diff --git a/mesecons_pressureplates/init.lua b/mesecons_pressureplates/init.lua
index 998223f..6c22db2 100644
--- a/mesecons_pressureplates/init.lua
+++ b/mesecons_pressureplates/init.lua
@@ -22,7 +22,7 @@ local function pp_on_timer(pos)
 		minetest.set_node(pos, {name = basename .. "_off"})
 		mesecon.receptor_off(pos, mesecon.rules.pplate)
 	elseif node.name == basename .. "_off" then
-		for _, obj in pairs(objs) do
+		for k, obj in pairs(objs) do
 			local objpos = obj:get_pos()
 			if objpos.y > pos.y-1 and objpos.y < pos.y then
 				minetest.set_node(pos, {name = basename .. "_on"})