diff --git a/nodejs/express.md b/nodejs/express.md
index 2652502a..d44bf57b 100644
--- a/nodejs/express.md
+++ b/nodejs/express.md
@@ -333,7 +333,7 @@ app.get("/hello/:who", function(req, res) {
 {% highlight javascript %}
 
 app.get('/hello/:who?',function(req,res) {
-	if(req.params.id) {
+	if(req.params.who) {
     	res.end("Hello, " + req.params.who + ".");
 	}
     else {