diff --git a/app/assets/javascripts/discourse/models/composer.js.es6 b/app/assets/javascripts/discourse/models/composer.js.es6
index 15844923c14..0244d3c2697 100644
--- a/app/assets/javascripts/discourse/models/composer.js.es6
+++ b/app/assets/javascripts/discourse/models/composer.js.es6
@@ -542,7 +542,6 @@ const Composer = Discourse.Model.extend({
           // It's no longer a new post
           createdPost.set('newPost', false);
           topic.set('draft_sequence', result.draft_sequence);
-          topic.set('details.auto_close_at', result.topic_auto_close_at);
           postStream.commitPost(createdPost);
           addedToStream = true;
         } else {
diff --git a/app/assets/javascripts/discourse/models/post-stream.js.es6 b/app/assets/javascripts/discourse/models/post-stream.js.es6
index 512c8d9ce35..7c3ae0cf265 100644
--- a/app/assets/javascripts/discourse/models/post-stream.js.es6
+++ b/app/assets/javascripts/discourse/models/post-stream.js.es6
@@ -624,9 +624,6 @@ const PostStream = Ember.Object.extend({
         return existing;
       }
 
-      // Update the auto_close_at value of the topic
-      this.set("topic.details.auto_close_at", post.get("topic_auto_close_at"));
-
       post.set('topic', this.get('topic'));
       postIdentityMap.set(post.get('id'), post);