diff --git a/addons/payment_paypal/models/payment.py b/addons/payment_paypal/models/payment.py
index b0834681707..cf0d0df23f8 100644
--- a/addons/payment_paypal/models/payment.py
+++ b/addons/payment_paypal/models/payment.py
@@ -81,7 +81,7 @@ class AcquirerPaypal(models.Model):
         else:
             percentage = self.fees_int_var
             fixed = self.fees_int_fixed
-        fees = (percentage / 100.0 * amount) + fixed / (1 - percentage / 100.0)
+        fees = (percentage / 100.0 * amount + fixed) / (1 - percentage / 100.0)
         return fees
 
     def paypal_form_generate_values(self, values):