diff --git a/.themes/classic/source/_includes/head.html b/.themes/classic/source/_includes/head.html
index a6ad0a00..ff3ac21e 100644
--- a/.themes/classic/source/_includes/head.html
+++ b/.themes/classic/source/_includes/head.html
@@ -19,6 +19,7 @@
     <meta name="keywords" content="{{page.keywords}}"/>
   {% endif %}
 
+  <link rel="canonical" href="{{ site.url }}{{ page.url }}"/>
   <link href="{{ root_url }}/favicon.png" rel="shortcut icon" />
   <link href="{{ root_url }}/stylesheets/screen.css" media="screen, projection" rel="stylesheet" type="text/css">
   <script src="{{ root_url }}/javascripts/modernizr-2.0.js"></script>