diff --git a/api-reference/server/frames/control-frames.mdx b/api-reference/server/frames/control-frames.mdx
index 8b6df299..3ba86a1c 100644
--- a/api-reference/server/frames/control-frames.mdx
+++ b/api-reference/server/frames/control-frames.mdx
@@ -231,6 +231,13 @@ Signals the beginning of a TTS audio response.
   Identifier linking this TTS output to its originating context.
 </ParamField>
 
+<ParamField path="append_to_context" type="bool" default="True">
+  Whether the spoken text for this response will be appended to the LLM
+  context. When `True`, the assistant aggregator will track this output as an
+  assistant turn, firing `on_assistant_turn_started` and
+  `on_assistant_turn_stopped` events.
+</ParamField>
+
 ### TTSStoppedFrame
 
 Signals the end of a TTS audio response.