diff --git a/admin_interface/admin.py b/admin_interface/admin.py
index 3f69642..b8f001b 100644
--- a/admin_interface/admin.py
+++ b/admin_interface/admin.py
@@ -6,6 +6,8 @@ from django.contrib.auth import models as auth_models
 from admin_interface.compat import gettext_lazy as _
 from admin_interface.models import Theme, UserTheme
 
+from .import_tema.admin import ImportMixin
+
 
 class UserInline(admin.TabularInline):
     model = UserTheme