diff --git a/app/controllers/zipdown_controller.rb b/app/controllers/zipdown_controller.rb
index 2f01c494..03a5b218 100644
--- a/app/controllers/zipdown_controller.rb
+++ b/app/controllers/zipdown_controller.rb
@@ -20,8 +20,10 @@ class ZipdownController < ApplicationController
       begin
         if params[:base64file]
           file = decode64(params[:base64file])
+          Rails.logger.info("##################detect_content_type: #{detect_content_type(file)}")
           send_file "#{OUTPUT_FOLDER}/#{file}", :filename => filename_for_content_disposition(file), :type => detect_content_type(file)
         else
+          Rails.logger.info("##################detect_content_type: #{detect_content_type(params[:file])}")
           send_file "#{OUTPUT_FOLDER}/#{params[:file]}", :filename => filename_for_content_disposition(params[:filename]), :type => detect_content_type(params[:file])
         end
       rescue => e