diff --git a/ihatemoney/forms.py b/ihatemoney/forms.py
index c0f87507..7585a521 100644
--- a/ihatemoney/forms.py
+++ b/ihatemoney/forms.py
@@ -195,7 +195,7 @@ class EditProjectForm(FlaskForm):
             raise ValidationError(msg)
         if (
             project is not None
-            and field.data != CurrencyConverter.no_currency
+            and field.data != project.default_currency
             and project.has_bills()
         ):
             msg = _(