diff --git a/app/models/post.rb b/app/models/post.rb
index 5a8488e2adad49..7120db505e82b3 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -86,8 +86,8 @@ class Post < ActiveRecord::Base
 
   scope :private_posts_for_user, ->(user) do
     where(
-      "posts.topic_id IN (#{Topic::PRIVATE_MESSAGES_SQL_USER})
-      OR posts.topic_id IN (#{Topic::PRIVATE_MESSAGES_SQL_GROUP})",
+      "topics.id IN (#{Topic::PRIVATE_MESSAGES_SQL_USER})
+      OR topics.id IN (#{Topic::PRIVATE_MESSAGES_SQL_GROUP})",
       user_id: user.id
     )
   end