diff --git a/app/assets/javascripts/discourse/components/header-extra-info.js.es6 b/app/assets/javascripts/discourse/components/header-extra-info.js.es6
index b71d9b1b14..2182f3ea34 100644
--- a/app/assets/javascripts/discourse/components/header-extra-info.js.es6
+++ b/app/assets/javascripts/discourse/components/header-extra-info.js.es6
@@ -5,8 +5,10 @@ const TopicCategoryComponent = Ember.Component.extend({
   secondRowItems: function() { return []; }.property(),
 
   pmPath: function() {
-    return this.get('currentUser').pmPath(this.get('topic'));
+    var currentUser = this.get('currentUser');
+    return currentUser && currentUser.pmPath(this.get('topic'));
   }.property('topic'),
+
   showPrivateMessageGlyph: function() {
     return !this.get('topic.is_warning') && this.get('topic.isPrivateMessage');
   }.property('topic.is_warning', 'topic.isPrivateMessage'),