diff --git a/addons/account/models/account_move_line.py b/addons/account/models/account_move_line.py
index b1b467c711a..8bc81fdad07 100644
--- a/addons/account/models/account_move_line.py
+++ b/addons/account/models/account_move_line.py
@@ -1868,7 +1868,7 @@ class AccountMoveLine(models.Model):
                     if not company_currency.is_zero(credit_exchange_amount):
                         exchange_lines_to_fix += credit_aml
                         amounts_list.append({'amount_residual': credit_exchange_amount})
-                        remaining_credit_amount += credit_exchange_amount
+                        remaining_credit_amount -= credit_exchange_amount
                         if credit_currency == company_currency:
                             remaining_credit_amount_curr -= credit_exchange_amount
                 else: