diff --git a/sinon-chrome/sinon-chrome.d.ts b/sinon-chrome/sinon-chrome.d.ts
index f5aa2344f..3057f7837 100644
--- a/sinon-chrome/sinon-chrome.d.ts
+++ b/sinon-chrome/sinon-chrome.d.ts
@@ -31,7 +31,7 @@ declare module SinonChrome {
 }
 
 declare module SinonChrome.events {
-    interface Event extends chrome.events.Event {
+    interface Event extends chrome.events.Event<Function> {
         trigger(...args: any[]): void;
         triggerAsync(...args: any[]): void;