diff --git a/nodeconductor/cost_tracking/migrations/0018_priceestimate_threshold.py b/nodeconductor/cost_tracking/migrations/0018_priceestimate_threshold.py
index <HASH>..<HASH> 100644
--- a/nodeconductor/cost_tracking/migrations/0018_priceestimate_threshold.py
+++ b/nodeconductor/cost_tracking/migrations/0018_priceestimate_threshold.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+import django.core.validators
 from django.db import models, migrations
Fix migration import (NC-<I>)