diff --git a/ihatemoney/forms.py b/ihatemoney/forms.py
index 9d4b188c..89e7b919 100644
--- a/ihatemoney/forms.py
+++ b/ihatemoney/forms.py
@@ -94,6 +94,7 @@ class EditProjectForm(FlaskForm):
         choices=LoggingMode.choices(),
         coerce=LoggingMode.coerce,
         default=LoggingMode.default(),
+        validators=[DataRequired()],
     )
 
     def save(self):