diff --git a/welco/sources/mail/models.py b/welco/sources/mail/models.py
index bd7db29..64e5c6b 100644
--- a/welco/sources/mail/models.py
+++ b/welco/sources/mail/models.py
@@ -77,7 +77,7 @@ class Mail(models.Model):
         from welco.contrib.alfortville.models import Inbox
         return Inbox.objects.filter(subtype=Inbox.AVIS,
                 source_type=ContentType.objects.get_for_model(Mail),
-                source_pk=self.id).exclude(comments__isnull=True).exclude(comments__exact='')
+                source_pk=self.id)
 
     def get_mandatory_avis(self):
         from welco.contrib.alfortville.models import Inbox