diff --git a/lib/components/Modal.js b/lib/components/Modal.js
index 34d23b1b..8e5f14c4 100644
--- a/lib/components/Modal.js
+++ b/lib/components/Modal.js
@@ -38,7 +38,7 @@ var Modal = createReactClass({
       overlay: PropTypes.object
     }),
     portalClassName: PropTypes.string,
-    bodyOpenClassName: React.PropTypes.string,
+    bodyOpenClassName: PropTypes.string,
     appElement: PropTypes.instanceOf(SafeHTMLElement),
     onAfterOpen: PropTypes.func,
     onRequestClose: PropTypes.func,