diff --git a/3d_armor/api.lua b/3d_armor/api.lua
index 38e9898..70cb584 100644
--- a/3d_armor/api.lua
+++ b/3d_armor/api.lua
@@ -416,6 +416,12 @@ end
 
 armor.damage = function(self, player, index, stack, use)
 	local old_stack = ItemStack(stack)
+	local worn_armor = armor:get_weared_armor_elements(player)
+	local armor_worn_cnt = 0
+	for k,v in pairs(worn_armor) do
+		armor_worn_cnt = armor_worn_cnt + 1
+	end
+	use = math.ceil(use/armor_worn_cnt)
 	stack:add_wear(use)
 	self:run_callbacks("on_damage", player, index, stack)
 	self:set_inventory_stack(player, index, stack)