Index: moodle/mod/lamslesson/lib.php
===================================================================
diff -u -r585c2e273fb963a8c0299f704499a71298c22b58 -r458edcd7121d8676f627e7f74a06952a54423bf6
--- moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision 585c2e273fb963a8c0299f704499a71298c22b58)
+++ moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision 458edcd7121d8676f627e7f74a06952a54423bf6)
@@ -711,7 +711,7 @@
 		$listofcontexts = '('.$sitecontext->id.')'; // must be site
 	}
 	$sql = "SELECT u.id
-		FROM {$CFG->prefix}user u INNER JOIN {$CFG->prefix}role_assignments r ON u.id=r.userid
+		FROM {user} u INNER JOIN {role_assignments} r ON u.id=r.userid
 		WHERE r.contextid IN $listofcontexts OR r.contextid=$context->id
 		AND u.deleted=0 AND u.username!='guest'";
 	$users = $DB->get_records_sql($sql);