diff --git a/plugins/shopping_cart/lib/shopping_cart_plugin.rb b/plugins/shopping_cart/lib/shopping_cart_plugin.rb
index c2acfaf..83ed6c8 100644
--- a/plugins/shopping_cart/lib/shopping_cart_plugin.rb
+++ b/plugins/shopping_cart/lib/shopping_cart_plugin.rb
@@ -1,4 +1,6 @@
 class ShoppingCartPlugin < Noosfero::Plugin
+  include ModalHelper
+  include ActionView::Helpers::UrlHelper
 
   class << self
     def plugin_name
@@ -63,4 +65,8 @@ class ShoppingCartPlugin < Noosfero::Plugin
 
     buttons
   end
+
+  def controller
+    context
+  end
 end
diff --git a/plugins/shopping_cart/views/cart.html.erb b/plugins/shopping_cart/views/cart.html.erb
index dac4baf..64d0c78 100644
--- a/plugins/shopping_cart/views/cart.html.erb
+++ b/plugins/shopping_cart/views/cart.html.erb
@@ -5,7 +5,7 @@
       <a href="cart:clean" onclick="Cart.clean(this); return false" class="cart-clean"><%=_('Clean basket')%></a>
       <ul class="cart-items"></ul>
       <div class="cart-total"><%=_('Total:')%> <b></b></div>
-      <a href="/plugin/shopping_cart/buy" class="cart-buy modal"><%=_('Shopping checkout')%></a>
+      <%= modal_link_to _('Shopping checkout'), { controller: 'shopping_cart_plugin', action: 'buy' }, { class: "cart-buy modal" } %>
     </div>
     <a href="#" onclick="Cart.toggle(this); return false" class="cart-toggle">
       <span class="str-show"><%=_('Show basket')%></span>
--
libgit2 0.21.2