diff --git modules/comment/comment.module modules/comment/comment.module
index 6a3cc88..c5202b5 100644
--- modules/comment/comment.module
+++ modules/comment/comment.module
@@ -102,7 +102,6 @@ function comment_entity_info() {
       'controller class' => 'CommentController',
       'entity keys' => array(
         'id' => 'cid',
-        'bundle' => 'node_type',
         'label' => 'subject',
       ),
       'bundles' => array(),