diff --git a/sale_commission_product_criteria/models/account_move.py b/sale_commission_product_criteria/models/account_move.py
index 1b1bce762..675012bcb 100644
--- a/sale_commission_product_criteria/models/account_move.py
+++ b/sale_commission_product_criteria/models/account_move.py
@@ -25,7 +25,7 @@ def _compute_amount(self):
                     inv_line.product_id,
                     inv_line.quantity,
                 )
-                if line.invoice_id.move_type == 'out_refund':
+                if line.invoice_id.move_type == "out_refund":
                     line.amount = -amount
                 else:
                     line.amount = amount
diff --git a/sale_commission_product_criteria_domain/models/account_invoice_line_agent.py b/sale_commission_product_criteria_domain/models/account_invoice_line_agent.py
index be5ccb476..335248af0 100644
--- a/sale_commission_product_criteria_domain/models/account_invoice_line_agent.py
+++ b/sale_commission_product_criteria_domain/models/account_invoice_line_agent.py
@@ -19,12 +19,16 @@ def _compute_amount(self):
                 and line.commission_id.commission_type == "product_restricted"
             ):
                 inv_line = line.object_id
-                line.amount = line._get_single_commission_amount(
+                amount = line._get_single_commission_amount(
                     line.commission_id,
                     inv_line.price_subtotal,
                     inv_line.product_id,
                     inv_line.quantity,
                 )
+                if line.invoice_id.move_type == "out_refund":
+                    line.amount = -amount
+                else:
+                    line.amount = amount
             else:
                 res = super(AccountInvoiceLineAgent, line)._compute_amount()
         return res