diff --git a/src/vscode-dts/vscode.proposed.chatParticipantPrivate.d.ts b/src/vscode-dts/vscode.proposed.chatParticipantPrivate.d.ts
index 9af69709a22..7b3e24ec14a 100644
--- a/src/vscode-dts/vscode.proposed.chatParticipantPrivate.d.ts
+++ b/src/vscode-dts/vscode.proposed.chatParticipantPrivate.d.ts
@@ -132,6 +132,10 @@ declare module 'vscode' {
 	 * ChatRequestTurn + private additions. Note- at runtime this is the SAME as ChatRequestTurn and instanceof is safe.
 	 */
 	export class ChatRequestTurn2 {
+		/**
+		 * The id of the chat request. Used to identity an interaction with any of the chat surfaces.
+		 */
+		readonly id?: string;
 		/**
 		 * The prompt as entered by the user.
 		 *
@@ -170,7 +174,7 @@ declare module 'vscode' {
 		/**
 		 * @hidden
 		 */
-		constructor(prompt: string, command: string | undefined, references: ChatPromptReference[], participant: string, toolReferences: ChatLanguageModelToolReference[], editedFileEvents: ChatRequestEditedFileEvent[] | undefined);
+		constructor(prompt: string, command: string | undefined, references: ChatPromptReference[], participant: string, toolReferences: ChatLanguageModelToolReference[], editedFileEvents: ChatRequestEditedFileEvent[] | undefined, id: string | undefined);
 	}
 
 	export class ChatResponseTurn2 {