diff --git a/lib/vagrant/action.rb b/lib/vagrant/action.rb
index 83c4573ad..3ee4b3308 100644
--- a/lib/vagrant/action.rb
+++ b/lib/vagrant/action.rb
@@ -43,6 +43,7 @@ module Vagrant
     #
     # @param [Object] callable An object which responds to `call`.
     def run(callable, options=nil)
+      callable = Builder.new.use(callable) if callable.kind_of?(Class)
       callable = self.class.actions[callable] if callable.kind_of?(Symbol)
 
       action_environment = Action::Environment.new(env)
diff --git a/test/vagrant/action_test.rb b/test/vagrant/action_test.rb
index 6c5d0a72e..ad0efe371 100644
--- a/test/vagrant/action_test.rb
+++ b/test/vagrant/action_test.rb
@@ -71,6 +71,19 @@ class ActionTest < Test::Unit::TestCase
       @instance.run(:call)
     end
 
+    should "run the given class if a class is given" do
+      callable = Class.new do
+        def initialize(app, env); end
+      end
+
+      callable.any_instance.expects(:call).with() do |env|
+        assert_equal :foo, env[:bar]
+        true
+      end
+
+      @instance.run(callable, :bar => :foo)
+    end
+
     should "error and exit if erroneous environment results" do
       callable = lambda do |env|
         env.error!(:key, :foo => :bar)