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..c6336bb92 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
@@ -25,6 +25,9 @@ def _compute_amount(self):
                     inv_line.product_id,
                     inv_line.quantity,
                 )
+                # Refunds commissions are negative
+                if inv_line.move_type and "refund" in inv_line.move_type:
+                    line.amount = -line.amount
             else:
                 res = super(AccountInvoiceLineAgent, line)._compute_amount()
         return res