diff --git a/orchestra/contrib/musician/validators.py b/orchestra/contrib/musician/validators.py
index 5289ccff..c117ae77 100644
--- a/orchestra/contrib/musician/validators.py
+++ b/orchestra/contrib/musician/validators.py
@@ -1,3 +1,6 @@
+from django.core.exceptions import ValidationError
+from django.utils.translation import gettext_lazy as _
+
 from orchestra.contrib.domains.helpers import domain_for_validation
 from orchestra.contrib.domains.models import Record
 from orchestra.contrib.domains.validators import validate_zone