diff --git a/plugins/providers/virtualbox/synced_folder.rb b/plugins/providers/virtualbox/synced_folder.rb
index 5ae14e63f..4a3ed916b 100644
--- a/plugins/providers/virtualbox/synced_folder.rb
+++ b/plugins/providers/virtualbox/synced_folder.rb
@@ -5,9 +5,12 @@ module VagrantPlugins
     class SyncedFolder < Vagrant.plugin("2", :synced_folder)
       def usable?(machine, raise_errors=false)
         # These synced folders only work if the provider if VirtualBox
-        machine.provider_name == :virtualbox &&
-          machine.provider_config &&
-          machine.provider_config.functional_vboxsf
+        return false if machine.provider_name != :virtualbox
+
+        # This only happens with `vagrant package --base`. Sigh.
+        return true if !machine.provider_config
+
+        machine.provider_config.functional_vboxsf
       end
 
       def prepare(machine, folders, _opts)