diff --git a/app/assets/javascripts/discourse/controllers/topic.js.es6 b/app/assets/javascripts/discourse/controllers/topic.js.es6
index ce13719f3be..17996c23ef6 100644
--- a/app/assets/javascripts/discourse/controllers/topic.js.es6
+++ b/app/assets/javascripts/discourse/controllers/topic.js.es6
@@ -313,6 +313,7 @@ export default Ember.Controller.extend(SelectedPostsCount, BufferedContent, {
 
       const quoteState = this.get('quoteState');
       const postStream = this.get('model.postStream');
+      if (!postStream) return;
       const quotedPost = postStream.findLoadedPost(quoteState.postId);
       const quotedText = Quote.build(quotedPost, quoteState.buffer);