diff --git a/welco/sources/mail/models.py b/welco/sources/mail/models.py
index 3b58da3..6d91fe9 100644
--- a/welco/sources/mail/models.py
+++ b/welco/sources/mail/models.py
@@ -99,6 +99,8 @@ class Mail(models.Model):
         for association in self.associations.all():
             if association.formdef_category:
                 categories[association.formdef_category] = True
+        if not categories and self.scanner_category:
+            categories[self.scanner_category] = True
         if not categories:
             return '-'
         return categories.keys()