diff --git a/lib/weblib.php b/lib/weblib.php
index 284676903aa..55f2de73583 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -4081,7 +4081,8 @@ function navmenu($course, $cm=NULL, $targetwindow='self') {
         $section = $mod->section;
 
         //Only add visible or teacher mods to jumpmenu
-        if ($mod->visible or has_capability('moodle/course:viewhiddenactivities', get_context_instance(CONTEXT_MODULE, $mod->id))) {
+        if ($mod->visible or has_capability('moodle/course:viewhiddenactivities', 
+                                             get_context_instance(CONTEXT_MODULE, $mod->cm))) {
             $url = $mod->mod .'/view.php?id='. $mod->cm;
             if ($flag) { // the current mod is the "next" mod
                 $nextmod = $mod;