diff --git a/boards/static/js/thread_update.js b/boards/static/js/thread_update.js
--- a/boards/static/js/thread_update.js
+++ b/boards/static/js/thread_update.js
@@ -111,7 +111,6 @@ function updateThread() {
             }
 
             updateBumplimitProgress(data.added.length);
-            updatePostBumpableStatus();
 
             if (data.added.length + data.updated.length > 0) {
                 showNewPostsTitle(data.added.length);
@@ -179,6 +178,7 @@ function updateBumplimitProgress(postDel
         var newPostsToLimit = bumplimit - postCount;
         if (newPostsToLimit <= 0) {
             $('.bar-bg').remove();
+            $('.thread').children('.post').addClass('dead_post');
         } else {
             postsToLimitElement.text(newPostsToLimit);
             progressBar.width((100 - postCount / bumplimit * 100.0) + '%');
@@ -186,17 +186,6 @@ function updateBumplimitProgress(postDel
     }
 }
 
-/**
- * If the bumplimit is reached, add dead_post class to all posts
- */
-function updatePostBumpableStatus() {
-    var postsToLimitElement = $('#left_to_limit');
-
-    if (postsToLimitElement === null) {
-        $('.thread').children('.post').addClass('dead_post');
-    }
-}
-
 var documentOriginalTitle = '';
 /**
  * Show 'new posts' text in the title if the document is not visible to a user