diff --git a/index.d.ts b/index.d.ts
index d93eae8..613c21c 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -43,6 +43,7 @@ declare namespace ElectronTabs {
   }
 
   export interface Tab extends EventEmitter {
+    id: number;
     setTitle(title: string): void;
     getTitle(): string;
     setBadge(badge: string): void;