diff --git a/addons/stock_account/models/account_invoice.py b/addons/stock_account/models/account_invoice.py
index 5dba13166ae..115006e4c48 100644
--- a/addons/stock_account/models/account_invoice.py
+++ b/addons/stock_account/models/account_invoice.py
@@ -76,7 +76,7 @@ class AccountInvoiceLine(models.Model):
         return self.product_id.standard_price
 
     def _get_price(self, company_currency, price_unit):
-        if self.invoice_id.currency_id.id != company_currency:
+        if self.invoice_id.currency_id.id != company_currency.id:
             price = company_currency.with_context(date=self.invoice_id.date_invoice).compute(price_unit * self.quantity, self.invoice_id.currency_id)
         else:
             price = price_unit * self.quantity