diff --git a/actionpack/lib/action_dispatch.rb b/actionpack/lib/action_dispatch.rb
index 1e87a016f9..ad6d54b6a2 100644
--- a/actionpack/lib/action_dispatch.rb
+++ b/actionpack/lib/action_dispatch.rb
@@ -47,7 +47,6 @@ module ActionDispatch
     autoload :Rescue
     autoload :ShowExceptions
     autoload :Static
-    autoload :StringCoercion
   end
 
   autoload :MiddlewareStack, 'action_dispatch/middleware/stack'
diff --git a/actionpack/lib/action_dispatch/middleware/string_coercion.rb b/actionpack/lib/action_dispatch/middleware/string_coercion.rb
deleted file mode 100644
index 232e947835..0000000000
--- a/actionpack/lib/action_dispatch/middleware/string_coercion.rb
+++ /dev/null
@@ -1,29 +0,0 @@
-module ActionDispatch
-  class StringCoercion
-    class UglyBody < ActiveSupport::BasicObject
-      def initialize(body)
-        @body = body
-      end
-
-      def each
-        @body.each do |part|
-          yield part.to_s
-        end
-      end
-
-      private
-        def method_missing(*args, &block)
-          @body.__send__(*args, &block)
-        end
-    end
-
-    def initialize(app)
-      @app = app
-    end
-
-    def call(env)
-      status, headers, body = @app.call(env)
-      [status, headers, UglyBody.new(body)]
-    end
-  end
-end
diff --git a/actionpack/test/abstract_unit.rb b/actionpack/test/abstract_unit.rb
index 27461ce673..3f7a5c89b9 100644
--- a/actionpack/test/abstract_unit.rb
+++ b/actionpack/test/abstract_unit.rb
@@ -114,7 +114,6 @@ end
 class ActionController::IntegrationTest < ActiveSupport::TestCase
   def self.build_app(routes = nil)
     ActionDispatch::MiddlewareStack.new { |middleware|
-      middleware.use "ActionDispatch::StringCoercion"
       middleware.use "ActionDispatch::ShowExceptions"
       middleware.use "ActionDispatch::Callbacks"
       middleware.use "ActionDispatch::ParamsParser"
diff --git a/actionpack/test/dispatch/string_coercion_test.rb b/actionpack/test/dispatch/string_coercion_test.rb
deleted file mode 100644
index d79b17b932..0000000000
--- a/actionpack/test/dispatch/string_coercion_test.rb
+++ /dev/null
@@ -1,40 +0,0 @@
-require 'abstract_unit'
-
-class StringCoercionTest < ActiveSupport::TestCase
-  test "body responds to each" do
-    original_body = []
-    body = ActionDispatch::StringCoercion::UglyBody.new(original_body)
-
-    assert original_body.respond_to?(:each)
-    assert body.respond_to?(:each)
-  end
-
-  test "body responds to to_path" do
-    original_body = []
-    def original_body.to_path; end
-    body = ActionDispatch::StringCoercion::UglyBody.new(original_body)
-
-    assert original_body.respond_to?(:to_path)
-    assert body.respond_to?(:to_path)
-  end
-
-  test "body does not responds to to_path" do
-    original_body = []
-    body = ActionDispatch::StringCoercion::UglyBody.new(original_body)
-
-    assert !original_body.respond_to?(:to_path)
-    assert !body.respond_to?(:to_path)
-  end
-
-  test "calls to_s on body parts" do
-    app = lambda { |env|
-      [200, {'Content-Type' => 'html'}, [1, 2, 3]]
-    }
-    app = ActionDispatch::StringCoercion.new(app)
-    parts = []
-    status, headers, body = app.call({})
-    body.each { |part| parts << part }
-
-    assert_equal %w( 1 2 3 ), parts
-  end
-end
diff --git a/railties/lib/rails/configuration.rb b/railties/lib/rails/configuration.rb
index 7929cba2fe..e976c971f0 100644
--- a/railties/lib/rails/configuration.rb
+++ b/railties/lib/rails/configuration.rb
@@ -19,7 +19,6 @@ module Rails
         middleware.use('ActionDispatch::ParamsParser')
         middleware.use('::Rack::MethodOverride')
         middleware.use('::Rack::Head')
-        middleware.use('ActionDispatch::StringCoercion')
       end
     end
 
diff --git a/railties/test/application/middleware_test.rb b/railties/test/application/middleware_test.rb
index df564011d3..397968a4e7 100644
--- a/railties/test/application/middleware_test.rb
+++ b/railties/test/application/middleware_test.rb
@@ -23,7 +23,6 @@ module ApplicationTests
         "ActionDispatch::ParamsParser",
         "Rack::MethodOverride",
         "Rack::Head",
-        "ActionDispatch::StringCoercion",
         "ActiveRecord::ConnectionAdapters::ConnectionManagement",
         "ActiveRecord::QueryCache"
       ], middleware