diff --git a/boards/models/thread.py b/boards/models/thread.py
--- a/boards/models/thread.py
+++ b/boards/models/thread.py
@@ -133,7 +133,7 @@ class Thread(models.Model):
         query = Post.objects.filter(threads__in=[self])
         query = query.order_by('pub_time').prefetch_related('images', 'thread', 'threads')
         if view_fields_only:
-            query = query.defer('poster_user_agent')
+            query = query.defer('poster_ip')
         return query.all()
 
     def get_replies_with_images(self, view_fields_only=False):