diff --git a/app/views/admin/archive_files/_form.html.erb b/app/views/admin/archive_files/_form.html.erb
index ecb7cf2..1daf794 100644
--- a/app/views/admin/archive_files/_form.html.erb
+++ b/app/views/admin/archive_files/_form.html.erb
@@ -167,7 +167,7 @@
           <div class="controls">
             <div class="link_append_target">
               <% I18n.with_locale(locale) do %>
-                <% f.object.urls.each_with_index do |url,i| %>
+                <% f.object.urls.to_a.each_with_index do |url,i| %>
                   <%= render :partial => "form_link", :locals=>{:f=>f,:locale=>locale,:url=>url,:url_text=>f.object.get_url_text(i,true)} %>
                 <% end %>
               <% end %>