diff --git a/packages/messaging/lib/index.d.ts b/packages/messaging/lib/index.d.ts
index 16bd8aeb..9374de9f 100644
--- a/packages/messaging/lib/index.d.ts
+++ b/packages/messaging/lib/index.d.ts
@@ -84,7 +84,10 @@ export namespace FirebaseMessagingTypes {
      * The message type of the message.
      */
     messageType?: string;
-
+    /**
+     * The topic name or message identifier.
+     */
+    from?: string;
     /**
      * The address for the message.
      */