diff --git a/data/scripts/actions/others/clay_lump.lua b/data/scripts/actions/others/clay_lump.lua
index 29110f3650..d4f293c563 100644
--- a/data/scripts/actions/others/clay_lump.lua
+++ b/data/scripts/actions/others/clay_lump.lua
@@ -8,9 +8,9 @@ local config = {
 local clayLump = Action()
 
 function clayLump.onUse(player, item, fromPosition, target, toPosition, isHotkey)
-	local random, tmpItem = math.random(0, 10000) * 0.01
+	local random = math.random(0, 10000) * 0.01
 	for i = 1, #config do
-		tmpItem = config[i]
+		local tmpItem = config[i]
 		if random >= tmpItem.chance[1] and random < tmpItem.chance[2] then
 			item:getPosition():sendMagicEffect(CONST_ME_POFF)