diff --git a/includes/api/ApiCreateTempUserTrait.php b/includes/api/ApiCreateTempUserTrait.php
index 9b4dc1fe09d..39894492b9a 100644
--- a/includes/api/ApiCreateTempUserTrait.php
+++ b/includes/api/ApiCreateTempUserTrait.php
@@ -56,14 +56,17 @@ trait ApiCreateTempUserTrait {
 		return [
 			'returnto' => [
 				ParamValidator::PARAM_TYPE => 'title',
+				ApiBase::PARAM_HELP_MSG => 'apihelp-edit-param-returnto',
 			],
 			'returntoquery' => [
 				ParamValidator::PARAM_TYPE => 'string',
 				ParamValidator::PARAM_DEFAULT => '',
+				ApiBase::PARAM_HELP_MSG => 'apihelp-edit-param-returntoquery',
 			],
 			'returntoanchor' => [
 				ParamValidator::PARAM_TYPE => 'string',
 				ParamValidator::PARAM_DEFAULT => '',
+				ApiBase::PARAM_HELP_MSG => 'apihelp-edit-param-returntoanchor',
 			],
 		];
 	}