diff --git a/auth/cas/cli/sync_users.php b/auth/cas/cli/sync_users.php
index 3498f8fbff3..a78f91dd182 100644
--- a/auth/cas/cli/sync_users.php
+++ b/auth/cas/cli/sync_users.php
@@ -44,6 +44,7 @@ define('CLI_SCRIPT', true);
 
 require(dirname(dirname(dirname(dirname(__FILE__)))).'/config.php');
 require_once($CFG->dirroot.'/course/lib.php');
+require_once($CFG->libdir.'/clilib.php');
 
 // Ensure errors are well explained
 set_debugging(DEBUG_DEVELOPER, true);
diff --git a/auth/ldap/cli/sync_users.php b/auth/ldap/cli/sync_users.php
index 5de52e0e08d..ee44dcf6606 100644
--- a/auth/ldap/cli/sync_users.php
+++ b/auth/ldap/cli/sync_users.php
@@ -48,6 +48,7 @@ define('CLI_SCRIPT', true);
 
 require(dirname(dirname(dirname(dirname(__FILE__)))).'/config.php'); // global moodle config file.
 require_once($CFG->dirroot.'/course/lib.php');
+require_once($CFG->libdir.'/clilib.php');
 
 // Ensure errors are well explained
 set_debugging(DEBUG_DEVELOPER, true);