diff --git a/course/lib.php b/course/lib.php
index c49f9602516..a0b14a166ef 100644
--- a/course/lib.php
+++ b/course/lib.php
@@ -1031,7 +1031,7 @@ function rebuild_course_cache($courseid=0) {
         $select = "";
     }
 
-    if ($courses = get_records_select("course", $select)) {
+    if ($courses = get_records_select("course", $select,'','id,fullname')) {
         foreach ($courses as $course) {
             $modinfo = serialize(get_array_of_activities($course->id));
             if (!set_field("course", "modinfo", $modinfo, "id", $course->id)) {