--- /var/tmp/host.rb	2012-05-11 10:01:24.000000000 -0500
+++ app/models/host.rb	2012-05-11 10:26:08.000000000 -0500
@@ -282,7 +282,8 @@ class Host < Puppet::Rails::Host
     param.update self.params
 
     info_hash = {}
-    info_hash['classes'] = self.puppetclasses_names
+    default_classes = [ 'common' ]
+    info_hash['classes'] = self.puppetclasses_names | default_classes
     info_hash['parameters'] = param
     info_hash['environment'] = param["foreman_env"]