diff --git a/payment_term.py b/payment_term.py
index a798d36b3b..9b16676b21 100644
--- a/payment_term.py
+++ b/payment_term.py
@@ -71,7 +71,7 @@ class PaymentTerm(ModelSQL, ModelView):
             remainder -= value
 
         if not currency.is_zero(remainder):
-            self.raise_user_error('missing_remainder', (self.rec_name))
+            self.raise_user_error('missing_remainder', (self.rec_name,))
         return res