diff --git a/lib/vagrant/action/environment.rb b/lib/vagrant/action/environment.rb
index d10ce2152..41f2ceb6e 100644
--- a/lib/vagrant/action/environment.rb
+++ b/lib/vagrant/action/environment.rb
@@ -4,7 +4,7 @@ module Vagrant
     # to the `call` method of each action. This environment contains
     # some helper methods for accessing the environment as well
     # as being a hash, to store any additional options.
-    class Environment < Hash
+    class Environment < Util::HashWithIndifferentAccess
       # The {Vagrant::Environment} object represented by this
       # action environment.
       attr_reader :env
@@ -50,44 +50,6 @@ module Vagrant
       def interrupted?
         !!@interrupted
       end
-
-      #-----------------------------------------------------------------
-      # Hash with indifferent access
-      #-----------------------------------------------------------------
-      def [](key)
-        super(convert_key(key))
-      end
-
-      def []=(key, value)
-        super(convert_key(key), value)
-      end
-
-      def delete(key)
-        super(convert_key(key))
-      end
-
-      def values_at(*indices)
-        indices.collect { |key| self[convert_key(key)] }
-      end
-
-      def merge(other)
-        dup.merge!(other)
-      end
-
-      def merge!(other)
-        other.each do |key, value|
-          self[convert_key(key)] = value
-        end
-        self
-      end
-
-      def has_key?(key)
-        super(convert_key(key))
-      end
-
-      def convert_key(key)
-        key.is_a?(Symbol) ? key.to_s : key
-      end
     end
   end
 end
diff --git a/lib/vagrant/util/hash_with_indifferent_access.rb b/lib/vagrant/util/hash_with_indifferent_access.rb
index 176cfb9d6..be7b86114 100644
--- a/lib/vagrant/util/hash_with_indifferent_access.rb
+++ b/lib/vagrant/util/hash_with_indifferent_access.rb
@@ -10,8 +10,8 @@ module Vagrant
     #   hash['foo'] #=> 'bar'
     #
     class HashWithIndifferentAccess < ::Hash
-      def initialize(hash={})
-        super()
+      def initialize(hash={}, &block)
+        super(&block)
 
         hash.each do |key, value|
           self[convert_key(key)] = value
diff --git a/test/vagrant/action/environment_test.rb b/test/vagrant/action/environment_test.rb
index eb21ec665..59e5b3173 100644
--- a/test/vagrant/action/environment_test.rb
+++ b/test/vagrant/action/environment_test.rb
@@ -6,6 +6,10 @@ class ActionEnvironmentTest < Test::Unit::TestCase
     @instance = @klass.new(mock_environment)
   end
 
+  should "be a hash with indifferent access" do
+    assert @instance.is_a?(Vagrant::Util::HashWithIndifferentAccess)
+  end
+
   should "default values to those on the env" do
     @instance.env.stubs(:key).returns("value")
     assert_equal "value", @instance["key"]
@@ -24,12 +28,4 @@ class ActionEnvironmentTest < Test::Unit::TestCase
     @instance.interrupt!
     assert @instance.interrupted?
   end
-
-  should "have indifferent access" do
-    @instance[:foo] = :bar
-    @instance["bar"] = :baz
-
-    assert_equal :bar, @instance["foo"]
-    assert_equal :baz, @instance[:bar]
-  end
 end
diff --git a/test/vagrant/util/hash_with_indifferent_access_test.rb b/test/vagrant/util/hash_with_indifferent_access_test.rb
index acf94dfd6..b4a8058e8 100644
--- a/test/vagrant/util/hash_with_indifferent_access_test.rb
+++ b/test/vagrant/util/hash_with_indifferent_access_test.rb
@@ -27,4 +27,13 @@ class HashWithIndifferentAccessUtilTest < Test::Unit::TestCase
     assert @instance.include?(:foo)
     assert @instance.member?(:foo)
   end
+
+  should "forward up block to Hash if given to initializer" do
+    instance = @klass.new do |h,k|
+      h[k] = "foo"
+    end
+
+    assert_equal "foo", instance[:foo]
+    assert_equal "foo", instance["foo"]
+  end
 end