diff --git a/src/adv/Adv.lua b/src/adv/Adv.lua
index 84623e8..1d34113 100644
--- a/src/adv/Adv.lua
+++ b/src/adv/Adv.lua
@@ -1194,6 +1194,7 @@ function Adv:supplyPotion()
 			if need < count then
 				advItems = advItems:setv(potionId,max)
 				potionBag[potionId] = count - need
+			elseif need < 0 then
 			else
 				advItems = advItems:setv(potionId,old + count)
 				potionBag[potionId] = nil
--
libgit2 0.21.2