// get list of courses containing modules if required
elseif (!empty($modulelist) and confirm_sesskey()) {
$modulename = $modulelist;
- $sql = "SELECT DISTINCT c.id FROM {$CFG->prefix}".$modulelist." module, {$CFG->prefix}course c"
+ $sql = "SELECT DISTINCT c.id FROM {".$modulelist."} module, {course} c"
." WHERE module.course=c.id";
$courseids = $DB->get_records_sql($sql);