diff --git a/www/conservancy/apps/staff/models.py b/www/conservancy/apps/staff/models.py
index 70876680a254d6a3942184f260e2a88d0127e04f..e1595c84c89059af0c5eb7a85652d50c81a04e49 100644
--- a/www/conservancy/apps/staff/models.py
+++ b/www/conservancy/apps/staff/models.py
@@ -7,7 +7,7 @@ class Person(models.Model):
     Referenced from other models (blog, events, etc)
     """
 
-    username = models.CharField(max_length=20)
+    username = models.CharField(max_length=20, unique=True)
     formal_name = models.CharField(max_length=200)
     casual_name = models.CharField(max_length=200)
 #    title = models.CharField(max_length=200, blank=True)
@@ -28,4 +28,3 @@ class Person(models.Model):
 
     def biography_url(self):
         return u"/about/#%s" % self.username
-