diff --git a/lib/components/Modal.js b/lib/components/Modal.js
index 729b17c7..59426dda 100644
--- a/lib/components/Modal.js
+++ b/lib/components/Modal.js
@@ -100,7 +100,7 @@ var Modal = React.createClass({
     }
   },
 
-  removePortal () {
+  removePortal: function() {
     ReactDOM.unmountComponentAtNode(this.node);
     var parent = getParentElement(this.props.parentSelector);
     parent.removeChild(this.node);
diff --git a/lib/components/ModalPortal.js b/lib/components/ModalPortal.js
index 0b1d518e..4045636c 100644
--- a/lib/components/ModalPortal.js
+++ b/lib/components/ModalPortal.js
@@ -77,7 +77,7 @@ var ModalPortal = module.exports = React.createClass({
     focusManager.teardownScopedFocus();
   },
 
-  open () {
+  open: function () {
     if (this.state.afterOpen && this.state.beforeClose) {
       clearTimeout(this.closeTimer);
       this.setState({ beforeClose: false });