From 8d7eac1b65fededabc8b083db593683c370e9981 Mon Sep 17 00:00:00 2001
From: Kenneth Geisshirt <geisshirt@gmail.com>
Date: Thu, 31 Aug 2017 10:18:10 +0200
Subject: [PATCH] Fix linter error (#1271)

---
 lib/extensions.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/extensions.js b/lib/extensions.js
index f2f034c5..48afae4c 100644
--- a/lib/extensions.js
+++ b/lib/extensions.js
@@ -107,7 +107,7 @@ module.exports = function(realmConstructor) {
 
         if (realmConstructor.Sync._setFeatureToken) {
             realmConstructor.Sync.setFeatureToken = function(featureToken) {
-                if (typeof featureToken !== 'string' || !featureToken instanceof String) {
+                if (typeof featureToken !== 'string' || !(featureToken instanceof String)) {
                     throw new Error("featureToken should be a string");
                 }