diff --git a/stock-manager.lua b/stock-manager.lua
index 520b9bc..43ef4c8 100644
--- a/stock-manager.lua
+++ b/stock-manager.lua
@@ -29,10 +29,7 @@ function remove_waste(source, discard_rest)
         if amounts_to_keep[item.name] ~= nil then
             local excess = item.count - amounts_to_keep[item.name][1]
             if excess > 0 then
-                amounts_to_keep[item.name][1] = 0
                 discard(item, excess, amounts_to_keep[item.name][2])
-            else
-                amounts_to_keep[item.name][1] = -excess
             end
         elseif DISCARD_REST then
             discard(item, amt, DISCARD_ADDR)