diff --git a/vector/src/main/java/im/vector/app/features/voicebroadcast/model/MessageVoiceBroadcastInfoContent.kt b/vector/src/main/java/im/vector/app/features/voicebroadcast/model/MessageVoiceBroadcastInfoContent.kt
index 5044bb5c34..a9db63c538 100644
--- a/vector/src/main/java/im/vector/app/features/voicebroadcast/model/MessageVoiceBroadcastInfoContent.kt
+++ b/vector/src/main/java/im/vector/app/features/voicebroadcast/model/MessageVoiceBroadcastInfoContent.kt
@@ -38,6 +38,8 @@ data class MessageVoiceBroadcastInfoContent(
         @Json(name = "m.relates_to") override val relatesTo: RelationDefaultContent? = null,
         @Json(name = "m.new_content") override val newContent: Content? = null,
 
+        /** The device from which the broadcast has been started. */
+        @Json(name = "device_id") val deviceId: String? = null,
         /** The [VoiceBroadcastState] value. **/
         @Json(name = "state") val voiceBroadcastStateStr: String = "",
         /** The length of the voice chunks in seconds. **/
diff --git a/vector/src/main/java/im/vector/app/features/voicebroadcast/usecase/StartVoiceBroadcastUseCase.kt b/vector/src/main/java/im/vector/app/features/voicebroadcast/usecase/StartVoiceBroadcastUseCase.kt
index ba1799c520..7e43439b45 100644
--- a/vector/src/main/java/im/vector/app/features/voicebroadcast/usecase/StartVoiceBroadcastUseCase.kt
+++ b/vector/src/main/java/im/vector/app/features/voicebroadcast/usecase/StartVoiceBroadcastUseCase.kt
@@ -71,6 +71,7 @@ class StartVoiceBroadcastUseCase @Inject constructor(
                 eventType = VoiceBroadcastConstants.STATE_ROOM_VOICE_BROADCAST_INFO,
                 stateKey = session.myUserId,
                 body = MessageVoiceBroadcastInfoContent(
+                        deviceId = session.sessionParams.deviceId,
                         voiceBroadcastStateStr = VoiceBroadcastState.STARTED.value,
                         chunkLength = chunkLength,
                 ).toContent()