diff --git a/game-server/app/services/chatService.ts b/game-server/app/services/chatService.ts
index 171d5e216..304ecfd05 100644
--- a/game-server/app/services/chatService.ts
+++ b/game-server/app/services/chatService.ts
@@ -253,7 +253,7 @@ function createChatRec(sender: boolean, curTime: Date, targetRoleId) {
  */
 async function updateRecentChats(sender: boolean, roleId: string, targetRoleId: string, curTime: Date) {
     const chatInfo = await ChatInfoModel.findInfo(roleId);
-    let recentPrivateChats = chatInfo?.recentPrivateChats||[];
+    let recentPrivateChats: PrivateChatRec[] = chatInfo?.recentPrivateChats||[]
     const recIdx = recentPrivateChats.findIndex(chat => { return chat.targetRoleId === targetRoleId });
     if (recIdx === -1) {
         recentPrivateChats.push(createChatRec(sender, curTime, targetRoleId));