diff --git a/src/pages/index/ChatPage.vue b/src/pages/index/ChatPage.vue
index 17bdb36..b38eaab 100644
--- a/src/pages/index/ChatPage.vue
+++ b/src/pages/index/ChatPage.vue
@@ -3,7 +3,7 @@
     <!-- 左侧导航 -->
     <aside class="app-sidebar">
       <div class="avatar my-avatar">
-        {{ currentUser.username.charAt(0) }}
+        {{ currentUser.username ? currentUser.username.charAt(0) : '' }}
       </div>
 
       <nav class="sidebar-nav" aria-label="功能导航">