diff --git a/app/assets/javascripts/discourse/controllers/topic_controller.js b/app/assets/javascripts/discourse/controllers/topic_controller.js
index 8fb34a56026..b02d367cce1 100644
--- a/app/assets/javascripts/discourse/controllers/topic_controller.js
+++ b/app/assets/javascripts/discourse/controllers/topic_controller.js
@@ -275,9 +275,9 @@ Discourse.TopicController = Discourse.ObjectController.extend(Discourse.Selected
   streamPercentage: function() {
     if (!this.get('postStream.loaded')) { return 0; }
     if (this.get('postStream.highest_post_number') === 0) { return 0; }
-    var perc = this.get('progressPosition') / this.get('filteredPostsCount');
+    var perc = this.get('progressPosition') / this.get('postStream.filteredPostsCount');
     return (perc > 1.0) ? 1.0 : perc;
-  }.property('postStream.loaded', 'progressPosition', 'filteredPostsCount'),
+  }.property('postStream.loaded', 'progressPosition', 'postStream.filteredPostsCount'),
 
   multiSelectChanged: function() {
     // Deselect all posts when multi select is turned off