diff --git a/app/models/post.rb b/app/models/post.rb
index eca7cee999f..fd892902f98 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -284,7 +284,8 @@ class Post < ActiveRecord::Base
                           AND p2.user_id <> post_timings.user_id
                       GROUP BY post_timings.topic_id, post_timings.post_number) AS x
                 WHERE x.topic_id = posts.topic_id
-                  AND x.post_number = posts.post_number")
+                  AND x.post_number = posts.post_number
+                  AND (posts.avg_time <> (x.gmean / 1000)::int OR posts.avg_time IS NULL)")
     end
   end