diff --git a/src/models/Call.ts b/src/models/Call.ts
index 7c427195636..147642d8732 100644
--- a/src/models/Call.ts
+++ b/src/models/Call.ts
@@ -892,6 +892,10 @@ export class ElementCall extends Call {
         this.messaging!.on(`action:${ElementWidgetActions.TileLayout}`, this.onTileLayout);
         this.messaging!.on(`action:${ElementWidgetActions.SpotlightLayout}`, this.onSpotlightLayout);
         this.messaging!.on(`action:${ElementWidgetActions.HangupCall}`, this.onHangup);
+        this.messaging!.on(`action:${ElementWidgetActions.DeviceMute}`, async (ev) => {
+            ev.preventDefault();
+            await this.messaging!.transport.reply(ev.detail, {}); // ack
+        });
 
         if (!this.widget.data?.skipLobby) {
             // If we do not skip the lobby we need to wait until the widget has
diff --git a/src/stores/widgets/ElementWidgetActions.ts b/src/stores/widgets/ElementWidgetActions.ts
index 36b6e2b6fc1..3c025d23458 100644
--- a/src/stores/widgets/ElementWidgetActions.ts
+++ b/src/stores/widgets/ElementWidgetActions.ts
@@ -21,8 +21,6 @@ export enum ElementWidgetActions {
     JoinCall = "io.element.join",
     HangupCall = "im.vector.hangup",
     CallParticipants = "io.element.participants",
-    MuteAudio = "io.element.mute_audio",
-    UnmuteAudio = "io.element.unmute_audio",
     MuteVideo = "io.element.mute_video",
     UnmuteVideo = "io.element.unmute_video",
     StartLiveStream = "im.vector.start_live_stream",
@@ -37,6 +35,23 @@ export enum ElementWidgetActions {
      * @deprecated Use MSC2931 instead
      */
     ViewRoom = "io.element.view_room",
+    // This can be sent as from or to widget
+    // fromWidget: updates the client about the current device mute state
+    // toWidget: the client requests a specific device mute configuration
+    //   The reply will always be the resulting configuration
+    //   It is possible to sent an empty configuration to retrieve the current values or
+    //   just one of the fields to update that particular value
+    //   An undefined field means that EC will keep the mute state as is.
+    //   -> this will allow the client to only get the current state
+    //
+    // The data of the widget action request and the response are:
+    // {
+    //   audio_enabled?: boolean,
+    //   video_enabled?: boolean
+    // }
+    // NOTE: this is currently unused. Its only here to make EW aware
+    // of this action so it does not throw errors.
+    DeviceMute = "io.element.device_mute",
 }
 
 export interface IHangupCallApiRequest extends IWidgetApiRequest {