diff --git a/ihatemoney/forms.py b/ihatemoney/forms.py
index 866e5e2e..c85d84e6 100644
--- a/ihatemoney/forms.py
+++ b/ihatemoney/forms.py
@@ -160,10 +160,8 @@ class EditProjectForm(FlaskForm):
         ):
             raise ValidationError(
                 _(
-                    (
-                        "This project cannot be set to 'no currency'"
-                        " because it contains bills in multiple currencies."
-                    )
+                    "This project cannot be set to 'no currency'"
+                    " because it contains bills in multiple currencies."
                 )
             )