diff --git a/dom/webidl/Event.webidl b/dom/webidl/Event.webidl
index 4d9a87928435..24eb456fa57b 100644
--- a/dom/webidl/Event.webidl
+++ b/dom/webidl/Event.webidl
@@ -10,7 +10,7 @@
  * liability, trademark and document use rules apply.
  */
 
-[Exposed=(Window,Worker), ProbablyShortLivingWrapper]
+[Exposed=(Window,Worker,AudioWorklet), ProbablyShortLivingWrapper]
 interface Event {
   constructor(DOMString type, optional EventInit eventInitDict = {});
 
diff --git a/dom/webidl/MessageEvent.webidl b/dom/webidl/MessageEvent.webidl
index 1dfe07744cdc..558a2cbc1667 100644
--- a/dom/webidl/MessageEvent.webidl
+++ b/dom/webidl/MessageEvent.webidl
@@ -7,7 +7,7 @@
  * https://html.spec.whatwg.org/#messageevent
  */
 
-[Exposed=(Window,Worker)]
+[Exposed=(Window,Worker,AudioWorklet)]
 interface MessageEvent : Event {
   constructor(DOMString type, optional MessageEventInit eventInitDict = {});