diff --git a/README.md b/README.md
index 244e53e..c37a9ed 100644
--- a/README.md
+++ b/README.md
@@ -397,7 +397,7 @@ var options = {
   key: '/VirtualBox/GuestInfo/Net/0/V4/IP',
 };
 
-virtualbox.guestproperty.get(function guestproperty_callback(machines, error) {
+virtualbox.guestproperty.get(options, function guestproperty_callback(machines, error) {
   if (error) throw error;
   // Act on machines
 });