diff --git a/lib/vagrant/registry.rb b/lib/vagrant/registry.rb
index df8147c9e..e69574ed8 100644
--- a/lib/vagrant/registry.rb
+++ b/lib/vagrant/registry.rb
@@ -34,6 +34,13 @@ module Vagrant
     def has_key?(key)
       @items.has_key?(key)
     end
+    
+    # Returns an array populated with the keys of this object.
+    #
+    # @return [Array]
+    def keys
+      @items.keys
+    end
 
     # Iterate over the keyspace.
     def each(&block)