diff --git a/app/models/deliverable.rb b/app/models/deliverable.rb
index 1f9a49b..4570e62 100644
--- a/app/models/deliverable.rb
+++ b/app/models/deliverable.rb
@@ -16,6 +16,10 @@ class Deliverable < ActiveRecord::Base
     ''
   end
 
+  def to_underscore
+    self.class.to_s.underscore
+  end
+
   def total=(v)
     if v.is_a? String
       write_attribute(:total, v.gsub(/[$ ,]/, ''))
diff --git a/app/views/deliverables/_form.html.erb b/app/views/deliverables/_form.html.erb
index 99ef95c..4540446 100644
--- a/app/views/deliverables/_form.html.erb
+++ b/app/views/deliverables/_form.html.erb
@@ -28,4 +28,4 @@
   <%= link_to(l(:button_cancel), cancel_path) %>
 <% end %>
 
-<%= wikitoolbar_for resource.class.to_s.underscore + '_notes' %>
+<%= wikitoolbar_for resource.to_underscore + '_notes' %>