diff --git a/mod/resource/index.php b/mod/resource/index.php
index 3a6146801a4..fd8c6420bec 100644
--- a/mod/resource/index.php
+++ b/mod/resource/index.php
@@ -15,6 +15,8 @@
     if ($course->category) {
         require_login($course->id);
         $navigation = "<A HREF=\"../../course/view.php?id=$course->id\">$course->shortname</A> ->";
+    } else {
+        $navigation = '';
     }
 
     add_to_log($course->id, "resource", "view all", "index.php?id=$course->id", "");