diff --git a/lib/capybara/rack_test/driver.rb b/lib/capybara/rack_test/driver.rb
index 6bc150fa..a888b069 100644
--- a/lib/capybara/rack_test/driver.rb
+++ b/lib/capybara/rack_test/driver.rb
@@ -72,4 +72,5 @@ class Capybara::RackTest::Driver < Capybara::Driver::Base
   def post(*args, &block); browser.post(*args, &block); end
   def put(*args, &block); browser.put(*args, &block); end
   def delete(*args, &block); browser.delete(*args, &block); end
+  def header(key, value); browser.header(key, value); end
 end
diff --git a/spec/capybara_spec.rb b/spec/capybara_spec.rb
index 8b8ed39d..5dc3bbee 100644
--- a/spec/capybara_spec.rb
+++ b/spec/capybara_spec.rb
@@ -17,7 +17,7 @@ describe Capybara do
   describe '.register_driver' do
     it "should add a new driver" do
       Capybara.register_driver :schmoo do |app|
-        Capybara::Driver::RackTest.new(app)
+        Capybara::RackTest::Driver.new(app)
       end
       session = Capybara::Session.new(:schmoo, TestApp)
       session.visit('/')