diff --git a/app/assets/javascripts/discourse/controllers/composer-messages.js.es6 b/app/assets/javascripts/discourse/controllers/composer-messages.js.es6
index 4f6a997f9..8fdbb1937 100644
--- a/app/assets/javascripts/discourse/controllers/composer-messages.js.es6
+++ b/app/assets/javascripts/discourse/controllers/composer-messages.js.es6
@@ -56,7 +56,7 @@ export default Ember.ArrayController.extend({
     var self = this;
     this.get('queuedForTyping').forEach(function(msg){
       if(self.popup){
-        this.popup(msg);
+        self.popup(msg);
       }
     });
   },