Chef::Provider::Service::Upstart does not set start_command

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Error executing action `start` on resource 'service[smbd]'
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Chef::Exceptions::Service
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#<Chef::Provider::Service::Upstart:0x00000004323dc8> requires that start_command be set

Resource Declaration:
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# In /var/cache/chef/cookbooks/samba/recipes/server.rb

 48: svcs.each do |s|
 49:   service s do
 50:     pattern "smbd|nmbd" if node["platform"] =~ /^arch$/
 51:     provider Chef::Provider::Service::Upstart if platform?("ubuntu")
 52:     action [:enable, :start]
 53:   end
 54: end

Compiled Resource:
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# Declared in /var/cache/chef/cookbooks/samba/recipes/server.rb:49:in `block in from_file'

service("smbd") do
  provider Chef::Provider::Service::Upstart
  action [:enable, :start]
  supports {:restart=>false, :reload=>false, :status=>false}
  retries 0
  retry_delay 2
  service_name "smbd"
  pattern "smbd"
  startup_type :automatic
  cookbook_name "samba"
  recipe_name "server"
end

[Thu, 26 Jul 2012 18:57:14 -0600] ERROR: Running exception handlers
[Thu, 26 Jul 2012 18:57:14 -0600] INFO: Resources updated this run:
[Thu, 26 Jul 2012 18:57:14 -0600] INFO:   bash[build emacs24]
[Thu, 26 Jul 2012 18:57:15 -0600] FATAL: Saving node information to /var/cache/chef/failed-run-data.json
[Thu, 26 Jul 2012 18:57:15 -0600] ERROR: Exception handlers complete
[Thu, 26 Jul 2012 18:57:15 -0600] FATAL: Stacktrace dumped to /var/cache/chef/chef-stacktrace.out
[Thu, 26 Jul 2012 18:57:15 -0600] FATAL: Chef::Exceptions::Service: service[smbd] (samba::server line 49) had an error: Chef::Exceptions::Service: #<Chef::Provider::Service::Upstart:0x00000004323dc8> requires that start_command be set