diff --git a/app/models/user.rb b/app/models/user.rb
index 54aa8d85e..f1b8c3d23 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -723,8 +723,8 @@ class User < ApplicationRecord
   end
 
   def validate_sensitive_string
-    raise("真实姓名包含敏感词汇，请重新输入") unless HarmoniousDictionary.clean?(lastname)
-    raise("昵称包含敏感词汇，请重新输入") unless HarmoniousDictionary.clean?(nickname)
+    raise("真实姓名包含敏感词汇，请重新输入") if lastname && !HarmoniousDictionary.clean?(lastname)
+    raise("昵称包含敏感词汇，请重新输入") if nickname && !HarmoniousDictionary.clean?(nickname)
   end
 
   def set_laboratory