diff --git a/barker/barker/printing/bill.py b/barker/barker/printing/bill.py
index 541ffd8..da5e6ed 100644
--- a/barker/barker/printing/bill.py
+++ b/barker/barker/printing/bill.py
@@ -40,6 +40,7 @@ def print_bill(voucher_id: uuid.UUID, db: Session):
         key = (
             i.product_id,
             i.is_happy_hour,
+            i.discount,
             frozenset(m.modifier_id for m in i.modifiers if m.modifier.show_in_bill),
         )
         if key in items_dict: