diff --git a/index.js b/index.js
index b78f342b..d969b4a9 100644
--- a/index.js
+++ b/index.js
@@ -51,7 +51,7 @@ app.post('/webhook/', function (req, res) {
 
 
 // recommended to inject access tokens as environmental variables, e.g.
-// const token = process.env.PAGE_ACCESS_TOKEN
+// const token = process.env.FB_PAGE_ACCESS_TOKEN
 const token = "<PAGE_ACCESS_TOKEN>"
 
 function sendTextMessage(sender, text) {