diff --git a/app/controllers/dmsf_controller.rb b/app/controllers/dmsf_controller.rb
index f448d7c3..a6abf645 100644
--- a/app/controllers/dmsf_controller.rb
+++ b/app/controllers/dmsf_controller.rb
@@ -52,6 +52,8 @@ class DmsfController < ApplicationController
         0
       end
     end
+    
+    @ajax_upload_size = Setting.plugin_redmine_dmsf['dmsf_max_ajax_upload_filesize'].present? ? Setting.plugin_redmine_dmsf['dmsf_max_ajax_upload_filesize'] : 100
   end
 
   def entries_operation
diff --git a/app/views/dmsf/_multi_upload.html.erb b/app/views/dmsf/_multi_upload.html.erb
index 792e8416..f0dae54c 100644
--- a/app/views/dmsf/_multi_upload.html.erb
+++ b/app/views/dmsf/_multi_upload.html.erb
@@ -25,10 +25,10 @@
 	<%= l(:label_file_size) %>: 
           <select id="uploader_select">
            <option value="1">
-              &lt; <%= "#{Setting.plugin_redmine_dmsf['dmsf_max_ajax_upload_filesize']}" %> MB
+              &lt; <%= "#{@ajax_upload_size}" %> MB
             </option>
             <option value="2">
-              > <%= "#{Setting.plugin_redmine_dmsf['dmsf_max_ajax_upload_filesize']}" %> MB
+              > <%= "#{@ajax_upload_size}" %> MB
             </option>
           </select>
       </div>
@@ -105,7 +105,7 @@
       uploader.plupload({
         runtimes : 'html5,flash,html4',
         url : '<%= url_for({:controller => 'dmsf_upload', :action => 'upload_file', :id => @project}) %>',
-        max_file_size : '<%= "#{Setting.plugin_redmine_dmsf['dmsf_max_ajax_upload_filesize']}mb" %>',
+        max_file_size : '<%= "#{@ajax_upload_size}mb" %>',
         max_file_count: '<%= Setting.plugin_redmine_dmsf['dmsf_max_file_upload'].to_i if Setting.plugin_redmine_dmsf['dmsf_max_file_upload'].to_i > 0 %>',
         multipart: true,
         multipart_params : {authenticity_token : jQuery('input[name=authenticity_token]').val()},