diff --git a/src/vs/workbench/api/common/extHostChatSessions.ts b/src/vs/workbench/api/common/extHostChatSessions.ts
index 039d0c6d8f5..94f2a91c1b5 100644
--- a/src/vs/workbench/api/common/extHostChatSessions.ts
+++ b/src/vs/workbench/api/common/extHostChatSessions.ts
@@ -1058,6 +1058,8 @@ export class ExtHostChatSessions extends Disposable implements ExtHostChatSessio
 			return undefined;
 		}
 
+		controllerData.controller.items.add(item);
+
 		return typeConvert.ChatSessionItem.from(item);
 	}