diff --git a/chrome/chrome-app.d.ts b/chrome/chrome-app.d.ts
index 5cfa0fbce4..f75f7dca65 100644
--- a/chrome/chrome-app.d.ts
+++ b/chrome/chrome-app.d.ts
@@ -138,6 +138,7 @@ declare module chrome.app.window {
 
     interface WindowEvent {
         addListener(callback: () => void): void;
+        removeListener(callback: () => void): void;
     }
 
     var onBoundsChanged: WindowEvent;