diff --git a/conservancy/contacts/models.py b/conservancy/contacts/models.py
index 58e89a75abb655072e7b663fb004f8eb8d3a6587..729b1c5c4581a6229a880e2ad68f85267394240f 100644
--- a/conservancy/contacts/models.py
+++ b/conservancy/contacts/models.py
@@ -4,6 +4,7 @@ from django.db import models
 class Unsubscription(models.Model):
     created = models.DateTimeField(auto_now_add=True, blank=True)
     email = models.EmailField()
+    mailout = models.SlugField()
 
     class Meta:
         ordering = ['created']