diff --git a/lib/navigationlib.php b/lib/navigationlib.php
index bbce7c17124..74eebe8d0a0 100644
--- a/lib/navigationlib.php
+++ b/lib/navigationlib.php
@@ -2349,9 +2349,11 @@ class global_navigation extends navigation_node {
             $coursenode->add(get_string('tags', 'tag'), new moodle_url('/tag/search.php'));
         }
 
-        // Calendar
-        $calendarurl = new moodle_url('/calendar/view.php', array('view' => 'month'));
-        $coursenode->add(get_string('calendar', 'calendar'), $calendarurl, self::TYPE_CUSTOM, null, 'calendar');
+        if (isloggedin()) {
+            // Calendar
+            $calendarurl = new moodle_url('/calendar/view.php', array('view' => 'month'));
+            $coursenode->add(get_string('calendar', 'calendar'), $calendarurl, self::TYPE_CUSTOM, null, 'calendar');
+        }
 
         // View course reports
         if (has_capability('moodle/site:viewreports', $this->page->context)) { // basic capability for listing of reports