diff --git a/README.md b/README.md
index 9e28d50..03b7f0f 100644
--- a/README.md
+++ b/README.md
@@ -131,32 +131,33 @@
 ```go
 // We need an object that implements the http.Handler interface.
 // Therefore we need a type for which we implement the ServeHTTP method.
-// We just use a map here, in which we map host names to http.Handlers
+// We just use a map here, in which we map host names (with port) to http.Handlers
 type HostSwitch map[string]http.Handler
 
 // Implement the ServerHTTP method on our new type
 func (hs HostSwitch) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// Check if a http.Handler is registered for the given host.
 	// If yes, use it to handle the request.
-	if handler := hs[r.URL.Host]; handler != nil {
+	if handler := hs[r.Host]; handler != nil {
 		handler.ServeHTTP(w, r)
+	} else {
+		// Handle host names for wich no handler is registered
+		http.Error(w, "Forbidden", 403) // Or Redirect?
 	}
-
-	// Handle host names for wich no handler is registered
-	http.Error(w, "Forbidden", 403) // Or Redirect?
 }
 
 func main() {
 	// Initialze a router as usual 
-    router := httprouter.New()
-    router.GET("/", Index)
-    router.GET("/hello/:name", Hello)
+	router := httprouter.New()
+	router.GET("/", Index)
+	router.GET("/hello/:name", Hello)
 
-    // Make a new HostSwitch and insert the router for example.com
-    hs := make(HostSwitch)
-    hs["example.com"] = router
+	// Make a new HostSwitch and insert the router (our http handler)
+	// for example.com and port 12345
+	hs := make(HostSwitch)
+	hs["example.com:12345"] = router
 
-    // Use the HostSwitch to listen and serve on port 12345
-    log.Fatal(http.ListenAndServe(":12345", hs))
+	// Use the HostSwitch to listen and serve on port 12345
+	log.Fatal(http.ListenAndServe(":12345", hs))
 }
 ```