Index: lib/moodlelib.php
===================================================================
--- lib/moodlelib.php   (revision 84)
+++ lib/moodlelib.php   (working copy)
@@ -3593,7 +3593,7 @@
     }
 
 /// Give local code a chance to delete its references to this course.
-    require_once('locallib.php');
+    require_once($CFG->libdir.'/locallib.php');
     notify_local_delete_course($courseid, $showfeedback);
 
 /// Delete course blocks