diff --git a/lib/navigationlib.php b/lib/navigationlib.php
index 24a175bb3214..1721ce23bffc 100644
--- a/lib/navigationlib.php
+++ b/lib/navigationlib.php
@@ -2589,7 +2589,8 @@ protected function load_for_user($user=null, $forceforcontext=false) {
                 }
             }
 
-            if (!empty($CFG->navadduserpostslinks)) {
+            // Only if the forum links are enabled and forum is installed...
+            if (!empty($CFG->navadduserpostslinks) && \core_component::get_component_directory('mod_forum') !== null) {
                 // Add nodes for forum posts and discussions if the user can view either or both
                 // There are no capability checks here as the content of the page is based
                 // purely on the forums the current user has access too.
@@ -5201,7 +5202,8 @@ protected function generate_user_settings($courseid, $userid, $gstitle='usercurr
             $profilenode = $mainpage->add(get_string('profile'), new moodle_url('/user/profile.php',
                     array('id' => $user->id)), self::TYPE_SETTING, null, 'myprofile');
 
-            if (!empty($CFG->navadduserpostslinks)) {
+            // Only if the forum links are enabled and forum is installed...
+            if (!empty($CFG->navadduserpostslinks) && \core_component::get_component_directory('mod_forum') !== null) {
                 // Add nodes for forum posts and discussions if the user can view either or both
                 // There are no capability checks here as the content of the page is based
                 // purely on the forums the current user has access too.