diff --git a/examples/web-service/index.js b/examples/web-service/index.js
index c22fea4032..a2cd2cb7f9 100644
--- a/examples/web-service/index.js
+++ b/examples/web-service/index.js
@@ -34,7 +34,7 @@ app.use('/api', function(req, res, next){
   if (!key) return next(error(400, 'api key required'));
 
   // key is invalid
-  if (!~apiKeys.indexOf(key)) return next(error(401, 'invalid api key'));
+  if (apiKeys.indexOf(key) === -1) return next(error(401, 'invalid api key'))
 
   // all good, store req.key for route access
   req.key = key;