diff --git a/lib/vagrant-lxc/driver/cli.rb b/lib/vagrant-lxc/driver/cli.rb
index dc62dab..6c676bb 100644
--- a/lib/vagrant-lxc/driver/cli.rb
+++ b/lib/vagrant-lxc/driver/cli.rb
@@ -84,7 +84,7 @@ module Vagrant
 
             if namespaces
               if supports_attach_with_namespaces?
-                extra = ['--namespaces', namespaces] if namespaces
+                extra = ['--namespaces', namespaces]
               else
                 raise LXC::Errors::NamespacesNotSupported
               end