diff --git a/hosting/models.py b/hosting/models.py
index 5b9645af..e1714094 100644
--- a/hosting/models.py
+++ b/hosting/models.py
@@ -177,6 +177,6 @@ class VMDetail(models.Model):
 
     def end_date(self):
         end_date = self.terminated_at if self.terminated_at else timezone.now()
-        months = relativedelta(end_date, self.created_at).months
+        months = relativedelta(end_date, self.created_at).months or 1
         end_date = self.created_at + relativedelta(months=months)
         return end_date