diff --git a/app/controllers/repositories_controller.rb b/app/controllers/repositories_controller.rb
index c8633eb9..fa97c32a 100644
--- a/app/controllers/repositories_controller.rb
+++ b/app/controllers/repositories_controller.rb
@@ -102,9 +102,9 @@ class RepositoriesController < ApplicationController
   end
 
   def sync_mirror
-    return render_error("正在镜像中..") if  @repo.mirror.waiting?
+    return render_error("正在镜像中..") if  @repo&.mirror&.waiting?
 
-    @repo.sync_mirror!
+    @repo.sync_mirror! if @repo&.mirror
     SyncMirroredRepositoryJob.perform_later(@repo.id, current_user.id)
     render_ok
   end