diff --git a/src/definition/livechat/ILivechatRoom.ts b/src/definition/livechat/ILivechatRoom.ts
index 8cfe7059b..98971baaa 100644
--- a/src/definition/livechat/ILivechatRoom.ts
+++ b/src/definition/livechat/ILivechatRoom.ts
@@ -1,6 +1,7 @@
 import { RoomType } from '../rooms';
 import type { IRoom } from '../rooms/IRoom';
 import type { IUser } from '../users';
+import type { IMessage } from '../messages';
 import type { IDepartment } from './IDepartment';
 import type { IVisitor } from './IVisitor';
 
@@ -36,6 +37,7 @@ export interface IVisitorChannelInfo {
 export interface ILivechatRoom extends IRoom {
     visitor: IVisitor;
     visitorChannelInfo?: IVisitorChannelInfo;
+    lastMessageFromVisitor?: IMessage;
     department?: IDepartment;
     servedBy?: IUser;
     responseBy?: IUser;
diff --git a/src/definition/rooms/IRoom.ts b/src/definition/rooms/IRoom.ts
index c62f5d7f0..161f472fb 100644
--- a/src/definition/rooms/IRoom.ts
+++ b/src/definition/rooms/IRoom.ts
@@ -1,4 +1,5 @@
 import type { IUser } from '../users';
+import type { IMessage } from '../messages';
 import type { RoomType } from './RoomType';
 
 export interface IRoom {
@@ -23,4 +24,5 @@ export interface IRoom {
     customFields?: { [key: string]: any };
     parentRoom?: IRoom;
     livechatData?: { [key: string]: any };
+    lastMessageFromVisitor?: IMessage;
 }