diff --git a/app/controllers/archives_controller.rb b/app/controllers/archives_controller.rb
index 5eb5b0d..c4dc4cb 100644
--- a/app/controllers/archives_controller.rb
+++ b/app/controllers/archives_controller.rb
@@ -1,7 +1,9 @@
 class ArchivesController < ApplicationController
 	def self.custom_widget_data
 		ac = ActionController::Base.new
-		ac.render_to_string("archives/custom_widget_data",:locals=>{:@custom_data_field=>@custom_data_field,:@field_name=>@field_name})
+		ac.instance_variable_set(:@custom_data_field, @custom_data_field)
+		ac.instance_variable_set(:@field_name, @field_name)
+		ac.render_to_string("archives/custom_widget_data")
 	end
 	#avoid the categories to be not in the ArchiveCategory
 	def serve_cmap