diff --git a/actionpack/lib/action_controller.rb b/actionpack/lib/action_controller.rb
index 50f20aa789..4e2d67954f 100644
--- a/actionpack/lib/action_controller.rb
+++ b/actionpack/lib/action_controller.rb
@@ -1,8 +1,8 @@
 require "active_support/rails"
 require "abstract_controller"
 require "action_dispatch"
-require "action_controller/metal/live"
-require "action_controller/metal/strong_parameters"
+require_relative "action_controller/metal/live"
+require_relative "action_controller/metal/strong_parameters"
 
 module ActionController
   extend ActiveSupport::Autoload
diff --git a/actionpack/lib/action_controller/api.rb b/actionpack/lib/action_controller/api.rb
index 94698df730..2bfa65021d 100644
--- a/actionpack/lib/action_controller/api.rb
+++ b/actionpack/lib/action_controller/api.rb
@@ -1,6 +1,6 @@
 require "action_view"
 require "action_controller"
-require "action_controller/log_subscriber"
+require_relative "log_subscriber"
 
 module ActionController
   # API Controller is a lightweight version of <tt>ActionController::Base</tt>,
diff --git a/actionpack/lib/action_controller/base.rb b/actionpack/lib/action_controller/base.rb
index 8c2b111f89..6e195fa359 100644
--- a/actionpack/lib/action_controller/base.rb
+++ b/actionpack/lib/action_controller/base.rb
@@ -1,6 +1,6 @@
 require "action_view"
-require "action_controller/log_subscriber"
-require "action_controller/metal/params_wrapper"
+require_relative "log_subscriber"
+require_relative "metal/params_wrapper"
 
 module ActionController
   # Action Controllers are the core of a web request in \Rails. They are made up of one or more actions that are executed
diff --git a/actionpack/lib/action_controller/metal/data_streaming.rb b/actionpack/lib/action_controller/metal/data_streaming.rb
index 731e03e2fc..3dbdd4a1b6 100644
--- a/actionpack/lib/action_controller/metal/data_streaming.rb
+++ b/actionpack/lib/action_controller/metal/data_streaming.rb
@@ -1,4 +1,4 @@
-require "action_controller/metal/exceptions"
+require_relative "exceptions"
 
 module ActionController #:nodoc:
   # Methods for sending arbitrary data and for streaming files to the browser,
diff --git a/actionpack/lib/action_controller/metal/request_forgery_protection.rb b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
index 5051c02a62..4468cbb2fc 100644
--- a/actionpack/lib/action_controller/metal/request_forgery_protection.rb
+++ b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
@@ -1,5 +1,5 @@
 require "rack/session/abstract/id"
-require "action_controller/metal/exceptions"
+require_relative "exceptions"
 require "active_support/security_utils"
 
 module ActionController #:nodoc:
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index fadfc8de60..054fe9e396 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -2,7 +2,7 @@ require "rails"
 require "action_controller"
 require "action_dispatch/railtie"
 require "abstract_controller/railties/routes_helpers"
-require "action_controller/railties/helpers"
+require_relative "railties/helpers"
 require "action_view/railtie"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index bc42d50205..9d8240e46d 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -4,7 +4,7 @@ require "active_support/core_ext/object/to_query"
 require "active_support/core_ext/module/anonymous"
 require "active_support/core_ext/hash/keys"
 require "active_support/testing/constant_lookup"
-require "action_controller/template_assertions"
+require_relative "template_assertions"
 require "rails-dom-testing"
 
 module ActionController