--- /usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/distro.py	2009-06-10 14:41:25.000000000 +0100
+++ /usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/distro.py	2009-07-24 12:16:52.000000000 +0100
@@ -136,7 +136,7 @@
                 msg = "locale-gen does not recognize your locale '%s'" % self.vm.lang
                 raise VMBuilderUserError(msg)
 
-        if self.vm.ec2:
+        if hasattr(self.vm, 'ec2') and self.vm.ec2:
             self.get_ec2_kernel()
             self.get_ec2_ramdisk()