diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index bb3a83bd23c..436a9b8b5a7 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -3894,8 +3894,9 @@ class AccountMoveLine(models.Model):
                 'discount': 0.0,
                 'price_unit': amount_currency / (quantity or 1.0),
             }
-        elif not discount_factor:
-            # balance of line is 0, but discount  == 100% so we display the normal unit_price
+        elif not discount_factor or not amount_currency:
+            # balance of line is 0, but discount == 100% or taxes (price included) == 100%,
+            # so we display the normal unit_price
             vals = {}
         else:
             # balance is 0, so unit price is 0 as well