diff --git a/sale.py b/sale.py
index 0bf9ff4..613cdbb 100644
--- a/sale.py
+++ b/sale.py
@@ -69,6 +69,7 @@ class Sale(metaclass=PoolMeta):
             sale.tax_amount_cache = sale.tax_amount
             sale.total_amount_cache = sale.total_amount
             sale.total_discount_cache = sale.total_discount
+            sale.total_tip_cache = sale.total_tip
         cls.save(sales)
 
     @classmethod
@@ -104,7 +105,9 @@ class Sale(metaclass=PoolMeta):
                 total_discount[sale.id] = round(sum(
                     (line.discount_amount * Decimal(line.quantity) for line in sale.lines
                         if line.discount_amount and line.type == 'line'), Decimal(0)), 2)
-                total_tip[sale.id] = round(sum((line.amount for line in sale.lines  if line.product and line.product.tip and line.type == 'line'), Decimal(0)), 2)
+                total_tip[sale.id] = round(sum(
+                    (line.amount for line in sale.lines  if line.product and line.product.tip and line.type == 'line'),
+                    Decimal(0)), 2)
                 if compute_taxes:
                     tax_amount[sale.id] = sale.get_tax_amount()
                     total_amount[sale.id] = (