diff --git a/app/models/guide.rb b/app/models/guide.rb
index 432da8c4..b3a9b8d2 100644
--- a/app/models/guide.rb
+++ b/app/models/guide.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'ostruct'
+
 class Guide
   class << self
     def all