diff --git a/app/models/comment.rb b/app/models/comment.rb
index a398ba2c4..3061d17f5 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -33,11 +33,11 @@ class Comment < ActiveRecord::Base
     end
 
     def deleted
-      where("is_deleted = true")
+      where("comments.is_deleted = true")
     end
 
     def undeleted
-      where("is_deleted = false")
+      where("comments.is_deleted = false")
     end
 
     def post_tags_match(query)