diff --git a/src/views/system/user/index.vue b/src/views/system/user/index.vue
index 1812e12..e558b24 100644
--- a/src/views/system/user/index.vue
+++ b/src/views/system/user/index.vue
@@ -533,7 +533,7 @@ function handleUpdate(row) {
     form.value = response.data
     postOptions.value = response.posts
     roleOptions.value = response.roles
-    form.value.postId = response.postIds[0]
+    form.value.postId = response.postIds.length > 0 ? response.postIds[0] : undefined
     form.value.postIds = response.postIds
     form.value.roleIds = response.roleIds
     open.value = true