diff --git a/core/server/api/canary/authentication.js b/core/server/api/canary/authentication.js
index c7d29332a3..5eddc202b0 100644
--- a/core/server/api/canary/authentication.js
+++ b/core/server/api/canary/authentication.js
@@ -1,7 +1,7 @@
 const Promise = require('bluebird');
 const api = require('./index');
 const config = require('../../../shared/config');
-const i18n = require('../../../shared/i18n');
+const tpl = require('@tryghost/tpl');
 const errors = require('@tryghost/errors');
 const web = require('../../web');
 const models = require('../../models');
@@ -14,6 +14,10 @@ const UsersService = require('../../services/users');
 const userService = new UsersService({dbBackup, models, auth, apiMail, apiSettings});
 const {deleteAllSessions} = require('../../services/auth/session');
 
+const messages = {
+    notTheBlogOwner: 'You are not the site owner.'
+};
+
 module.exports = {
     docName: 'authentication',
 
@@ -67,7 +71,7 @@ module.exports = {
             return models.User.findOne({role: 'Owner', status: 'all'})
                 .then((owner) => {
                     if (owner.id !== frame.options.context.user) {
-                        throw new errors.NoPermissionError({message: i18n.t('errors.api.authentication.notTheBlogOwner')});
+                        throw new errors.NoPermissionError({message: tpl(messages.notTheBlogOwner)});
                     }
                 });
         },