diff --git a/chrome/chrome.d.ts b/chrome/chrome.d.ts
index 8b77c9617..32be9d309 100644
--- a/chrome/chrome.d.ts
+++ b/chrome/chrome.d.ts
@@ -1718,6 +1718,7 @@ declare module chrome.tabs {
     }
 
     interface TabRemoveInfo {
+        windowId: number;
         isWindowClosing: boolean;
     }