diff --git a/src/NavBar.js b/src/NavBar.js
index 4e951ca52..e21e99489 100644
--- a/src/NavBar.js
+++ b/src/NavBar.js
@@ -122,6 +122,7 @@ const propTypes = {
   titleStyle: PropTypes.object,
   position: PropTypes.object,
   navigationBarStyle: PropTypes.object,
+  renderTitle: PropTypes.any,
 };
 
 const contextTypes = {