diff --git a/lib/tasks/user_agent.rake b/lib/tasks/user_agent.rake
index b5009fcd..4079458d 100644
--- a/lib/tasks/user_agent.rake
+++ b/lib/tasks/user_agent.rake
@@ -12,12 +12,13 @@ namespace :sync do
         created_on = User.where(id: user_action).maximum(:created_on)
 
         # 即代理之前注册
-
-        if created_on < ua.created_at
-          params = params.merge(:register_status => 1)
-        else
-          # 代理之后注册的
-          params = params.merge(:register_status => 2)
+        if created_on.present?
+          if created_on < ua.created_at
+            params = params.merge(:register_status => 1)
+          else
+            # 代理之后注册的
+            params = params.merge(:register_status => 2)
+          end
         end
       end