diff --git a/app/models/concerns/variant_stock.rb b/app/models/concerns/variant_stock.rb
index 53414ab8eb..d043db7d1a 100644
--- a/app/models/concerns/variant_stock.rb
+++ b/app/models/concerns/variant_stock.rb
@@ -16,7 +16,7 @@ module VariantStock
   extend ActiveSupport::Concern
 
   included do
-    attr_accessible :on_hand
+    attr_accessible :on_hand, :on_demand
     after_update :save_stock
   end