diff --git a/app/models.py b/app/models.py
index 2fd092f7..2bbc23d6 100644
--- a/app/models.py
+++ b/app/models.py
@@ -113,7 +113,7 @@ class User(db.Model, ModelMixin, UserMixin):
         db.session.flush()
 
         # create a first alias mail to show user how to use when they login
-        GenEmail.create_new_gen_email(user_id=user.id)
+        GenEmail.create_custom_alias(user.id, prefix="my-first-alias")
         db.session.flush()
 
         return user