diff --git a/app/helpers/todos_helper.rb b/app/helpers/todos_helper.rb
index fd7039d4..ec7a2d3c 100644
--- a/app/helpers/todos_helper.rb
+++ b/app/helpers/todos_helper.rb
@@ -82,7 +82,8 @@ module TodosHelper
 
   
   def remote_toggle_checkbox
-    check_box_tag('item_id', toggle_check_todo_path(@todo), @todo.completed?, :class => 'item-checkbox')
+    check_box_tag('item_id', toggle_check_todo_path(@todo), @todo.completed?, :class => 'item-checkbox',
+                  :disabled => @todo.pending?)
   end
   
   def date_span