diff --git a/vector/src/main/java/im/vector/app/features/voicebroadcast/VoiceBroadcastConstants.kt b/vector/src/main/java/im/vector/app/features/voicebroadcast/VoiceBroadcastConstants.kt
new file mode 100644
index 0000000000..d7d74b08e9
--- /dev/null
+++ b/vector/src/main/java/im/vector/app/features/voicebroadcast/VoiceBroadcastConstants.kt
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.voicebroadcast
+
+/** Voice Broadcast State Event. */
+const val STATE_ROOM_VOICE_BROADCAST_INFO = "io.element.voice_broadcast_info"