diff --git a/vanilla/applications/vanilla/views/modules/discussionfilter.php b/vanilla/applications/vanilla/views/modules/discussionfilter.php
index b08456b..ce3eed8 100644
--- a/vanilla/applications/vanilla/views/modules/discussionfilter.php
+++ b/vanilla/applications/vanilla/views/modules/discussionfilter.php
@@ -50,9 +50,11 @@
                $isActive = true;
             }
 
-            $menuOptions['AllCategories']['Url'] = anchor('Public Forums', '/categories');
-            $menuOptions['AllCategories']['IsActive'] = $isActive;
-            $menuOptions['AllCategories']['CssClass'] = $CssClass;
+            if(gdn::session()->isValid()) {
+                $menuOptions['AllCategories']['Url'] = anchor('Public Forums', '/categories');
+                $menuOptions['AllCategories']['IsActive'] = $isActive;
+                $menuOptions['AllCategories']['CssClass'] = $CssClass;
+            }
 
             $Controller->EventArguments['Menu'] = &$menuOptions;
             $Controller->fireEvent('BeforeRenderDiscussionFilters');