diff --git a/lib/vagrant.rb b/lib/vagrant.rb
index 56c9b9fae..2a714d459 100644
--- a/lib/vagrant.rb
+++ b/lib/vagrant.rb
@@ -263,6 +263,10 @@ end
 # Default I18n to load the en locale
 I18n.load_path << File.expand_path("templates/locales/en.yml", Vagrant.source_root)
 
+# Make sure only available locales are used. This will be the default in the
+# future but we need this to silence a deprecation warning from 0.6.9
+I18n.config.enforce_available_locales = true
+
 # A lambda that knows how to load plugins from a single directory.
 plugin_load_proc = lambda do |directory|
   # We only care about directories