diff --git a/mod/resource/type/file/resource.class.php b/mod/resource/type/file/resource.class.php
index 15c038b2490..995721a1e3b 100644
--- a/mod/resource/type/file/resource.class.php
+++ b/mod/resource/type/file/resource.class.php
@@ -178,7 +178,7 @@ function update_instance($resource) {
 * @param    THEME   global object
 */
 function display() {
-    global $CFG, $THEME;
+    global $CFG, $THEME, $course;
 
 /// Set up generic stuff first, including checking for access
     parent::display();