diff --git a/oregen-manager.lua b/oregen-manager.lua
index 9a74d32..1719662 100644
--- a/oregen-manager.lua
+++ b/oregen-manager.lua
@@ -251,8 +251,10 @@ function getNumCraftable (ingredients, current_stock)
     return result
 end
 
-function adjustStock (current_stock, recipe, count)
-    for _, ingredient in ipairs(recipe.ingredients) do
+function adjustStock (current_stock, ingredients, count)
+    if count == 0 then return end
+    local item, i_count
+    for _, ingredient in ipairs(ingredients) do
         item, i_count = ingredient[1], ingredient[2]
         current_stock[item] = current_stock[item] - (i_count * count)
     end
@@ -263,7 +265,7 @@ function craftRecipe (ticker, recipe, current_stock)
     if recipe.limit ~= nil then
         count = math.min(count, recipe.limit)
     end
-    adjustStock(current_stock, recipe, count)
+    adjustStock(current_stock, recipe.ingredients, count)
     local createRequest
     createRequest = function (recipe, i)
         if i == nil then i = 1 end