diff --git a/src/components/ModalPortal.js b/src/components/ModalPortal.js
index 4ad62d2b..c31d62e7 100644
--- a/src/components/ModalPortal.js
+++ b/src/components/ModalPortal.js
@@ -22,7 +22,8 @@ export default class ModalPortal extends Component {
     style: {
       overlay: {},
       content: {}
-    }
+    },
+    defaultStyles: {}
   };
 
   static propTypes = {