diff --git a/xos/core/models/user.py b/xos/core/models/user.py
index dc96c22..e34abdb 100644
--- a/xos/core/models/user.py
+++ b/xos/core/models/user.py
@@ -107,7 +107,7 @@
 
     phone = StrippedCharField(null=True, blank=True, help_text="phone number contact", max_length=100)
     user_url = models.URLField(null=True, blank=True)
-    site = models.ForeignKey(Site, related_name='users', help_text="Site this user will be homed too", null=True)
+    site = models.ForeignKey(Site, related_name='users', help_text="Site this user will be homed too")
     public_key = models.TextField(null=True, blank=True, max_length=1024, help_text="Public key string")
 
     is_active = models.BooleanField(default=True)