diff --git a/README.md b/README.md
index 5f8b901c..c1abfcc0 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ Example program displaying the value of `sys.version`:
 ```rust
 extern crate pyo3;
 
-use pyo3::{Python, PyDict, PyResult};
+use pyo3::{Python, PyDict, PyResult, ObjectProtocol};
 
 fn main() {
     let gil = Python::acquire_gil();