diff --git a/distributed_audio/audio/v1_0/AudioTypes.idl b/distributed_audio/audio/v1_0/AudioTypes.idl
index 64ff19f4927fd2af79dafc8c184a180db0e5aa49..b01c377bbe55032194097a3002bc6caf6a8f101d 100644
--- a/distributed_audio/audio/v1_0/AudioTypes.idl
+++ b/distributed_audio/audio/v1_0/AudioTypes.idl
@@ -289,6 +289,7 @@ enum AudioExtParamKey {
     AUDIO_EXT_PARAM_KEY_EFFECT   = 4,    /**< Distributed audio extra param key audio effect event */
     AUDIO_EXT_PARAM_KEY_STATUS   = 5,    /**< Distributed audio extra param key device status event */
     AUDIO_EXT_PARAM_KEY_USB_DEVICE = 101, /**< Check USB device type ARM or HIFI */
+    AUDIO_EXT_PARAM_KEY_STREAMTYPE_CHANGE = 401, /**< Stream type change and notify */
     AUDIO_EXT_PARAM_KEY_LOWPOWER = 1000, /**< Low power event type */
 };