diff --git a/packages/service-worker/src/push.ts b/packages/service-worker/src/push.ts
index a9e90928d9..7f2cedaa4e 100644
--- a/packages/service-worker/src/push.ts
+++ b/packages/service-worker/src/push.ts
@@ -45,7 +45,7 @@ import {ERR_SW_NOT_SUPPORTED, NgswCommChannel, PushEvent} from './low_level';
  * {
  *   "notification": {
  *     "actions": NotificationAction[],
- *     "badge": USVString
+ *     "badge": USVString,
  *     "body": DOMString,
  *     "data": any,
  *     "dir": "auto"|"ltr"|"rtl",