diff --git a/packages/messaging-types/index.d.ts b/packages/messaging-types/index.d.ts
index 147942e2774..a4d5da954b9 100644
--- a/packages/messaging-types/index.d.ts
+++ b/packages/messaging-types/index.d.ts
@@ -34,4 +34,5 @@ export class FirebaseMessaging {
   requestPermission(): Promise<any> | null;
   setBackgroundMessageHandler(callback: (a: Object) => any): any;
   useServiceWorker(registration: any): any;
+  usePublicVapidKey(b64PublicKey: string): void;
 }