diff --git a/docs/voice/pipelines/index.md b/docs/voice/pipelines/index.md
index 957f35ef..093baa60 100644
--- a/docs/voice/pipelines/index.md
+++ b/docs/voice/pipelines/index.md
@@ -50,7 +50,7 @@ The following events can be emitted:
 | `stt-vad-end`    | End of voice command      | audio only | `timestamp`: time relative to start of audio stream (milliseconds)
 | `stt-end`      | End of speech to text        | audio only | `stt_output` - Object with `text`, the detected text.                                                                                                                                                                                                                   |
 | `intent-start` | Start of intent recognition  | always     | `engine` - [Agent](/docs/intent_conversation_api) engine used<br />`language`: Processing language. <br /> `intent_input` - Input text to agent                                                                                                                         |
-| `intent-progress`   | Intermediate update of intent recognition    | depending on conversation agent     | `chat_log_delta` - delta object from the [chat log](/docs/core/entity/conversation#chat-log)                                                                                                                                                                          |
+| `intent-progress`   | Intermediate update of intent recognition    | depending on conversation agent     | `chat_log_delta` - optional, delta object from the [chat log](/docs/core/entity/conversation#chat-log) <br /> `tts_start_streaming` - optional, True if TTS streaming has started                                                                                                                                                                          |
 | `intent-end`   | End of intent recognition    | always     | `intent_output` - [conversation response](/docs/intent_conversation_api#conversation-response)                                                                                                                                                                          |
 | `tts-start`    | Start of text to speech      | audio only | `engine` - TTS engine used<br />`language`: Output language.<br />`voice`: Output voice. <br />`tts_input`: Text to speak.                                                                                                                                              |
 | `tts-end`      | End of text to speech        | audio only | `token` - Token of the generated audio<br />`url` - URL to the generated audio<br />`mime_type` - MIME type of the generated audio<br />                                                                                                                   |