diff --git a/src/Portal.js b/src/Portal.js
index 575f93268b..4cccd243e7 100644
--- a/src/Portal.js
+++ b/src/Portal.js
@@ -24,7 +24,7 @@ let Portal = React.createClass({
 
   componentWillUnmount() {
     this._unrenderOverlay();
-    this._mountOverlayTarget();
+    this._unmountOverlayTarget();
   },
 
   _mountOverlayTarget() {