diff --git a/enrol/lti/login.php b/enrol/lti/login.php
index 33b168bd436..2cc2264fc3d 100644
--- a/enrol/lti/login.php
+++ b/enrol/lti/login.php
@@ -40,7 +40,7 @@ require_once(__DIR__."/../../config.php");
 // See http://www.imsglobal.org/spec/security/v1p0/#step-1-third-party-initiated-login.
 // Validate these here, despite further validation in the LTI 1.3 library.
 $iss = required_param('iss', PARAM_URL); // Issuer URI of the calling platform.
-$loginhint = required_param('login_hint', PARAM_INT); // Platform ID for the person to login.
+$loginhint = required_param('login_hint', PARAM_RAW); // Platform ID for the person to login.
 $targetlinkuri = required_param('target_link_uri', PARAM_URL); // The took launch URL.
 
 // Optional lti_message_hint. See https://www.imsglobal.org/spec/lti/v1p3#additional-login-parameters-0.