diff --git a/lib/chewy/index/crutch.rb b/lib/chewy/index/crutch.rb
index d9931cd8..a25eb4ad 100644
--- a/lib/chewy/index/crutch.rb
+++ b/lib/chewy/index/crutch.rb
@@ -9,6 +9,8 @@ module Crutch
       end
 
       class Crutches
+        attr_reader :update_fields
+
         def initialize(index, collection, update_fields: [])
           @index = index
           @collection = collection