diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index ebbe7c343..e0dcda93f 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -275,7 +275,7 @@ class WechatsController < ActionController::Base
     ps = ProjectsService.new
     status = ps.join_project({invite_code: project.invite_code}, user)
     if status[:state] != 0
-      raise ProjectService::JoinProjectError.message(status)
+      raise ProjectsService::JoinProjectError.message(status)
     end
 
     creator = User.find(project.user_id)