diff --git a/lang/en/webservice.php b/lang/en/webservice.php
index f1aebefde9f..30671b27167 100644
--- a/lang/en/webservice.php
+++ b/lang/en/webservice.php
@@ -122,6 +122,7 @@ $string['removefunctionconfirm'] = 'Do you really want to remove function "{$a->
 $string['requireauthentication'] = 'This method requires authentication with xxx permission.';
 $string['required'] = 'Required';
 $string['requiredcapability'] = 'Required capability';
+$string['requiredcapability_help'] = 'If set, only users with the required capability can access the service.';
 $string['resettokenconfirm'] = 'Do you really want to reset this web service key for <strong>{$a->user}</strong> on the service <strong>{$a->service}</strong>?';
 $string['resettokenconfirmsimple'] = 'Do you really want to reset this key? Any saved links containing the old key will not work anymore.';
 $string['response'] = 'Response';