diff --git a/src/components/not-found.js b/src/components/not-found.js
index a1cbe33..d8fbf93 100644
--- a/src/components/not-found.js
+++ b/src/components/not-found.js
@@ -28,6 +28,5 @@ export default class NotFound extends React.PureComponent {
 
 NotFound.propTypes /* remove-proptypes */ = {
   notFound: PropTypes.func.isRequired,
-  notFoundString: PropTypes.string.isRequired,
   emojiProps: PropTypes.object.isRequired,
 }