diff --git a/types/chrome/index.d.ts b/types/chrome/index.d.ts
index cde1de9092..d12bf94302 100644
--- a/types/chrome/index.d.ts
+++ b/types/chrome/index.d.ts
@@ -5041,7 +5041,7 @@ declare namespace chrome.runtime {
 
     export interface PortDisconnectEvent extends chrome.events.Event<(port: Port) => void> {}
 
-    export interface PortMessageEvent extends chrome.events.Event<(message: Object, port: Port) => void> {}
+    export interface PortMessageEvent extends chrome.events.Event<(message: any, port: Port) => void> {}
 
     export interface ExtensionMessageEvent extends chrome.events.Event<(message: any, sender: MessageSender, sendResponse: (response: any) => void) => void> {}