diff --git a/app/controllers/gits_controller.rb b/app/controllers/gits_controller.rb
index 1965f61ba..910864812 100644
--- a/app/controllers/gits_controller.rb
+++ b/app/controllers/gits_controller.rb
@@ -32,7 +32,7 @@ class GitsController < ApplicationController
         system_user = User.find_by_login(input_username) || User.find_by_mail(input_username) || User.find_by_phone(input_username)
 
         # 如果用户名密码错误
-        if !system_user.check_password?(input_password)
+        if system_user && !system_user.check_password?(input_password)
           uid_logger_error("git start: password is wrong")
           result = false
         else