diff --git a/railties/lib/initializer.rb b/railties/lib/initializer.rb
index 09e83ab474cb4..91c9cc10810b4 100644
--- a/railties/lib/initializer.rb
+++ b/railties/lib/initializer.rb
@@ -203,10 +203,10 @@ def set_load_path
     # Set the paths from which Rails will automatically load source files, and
     # the load_once paths.
     def set_autoload_paths
-      Dependencies.load_paths = configuration.load_paths.uniq
-      Dependencies.load_once_paths = configuration.load_once_paths.uniq
+      ActiveSupport::Dependencies.load_paths = configuration.load_paths.uniq
+      ActiveSupport::Dependencies.load_once_paths = configuration.load_once_paths.uniq
 
-      extra = Dependencies.load_once_paths - Dependencies.load_paths
+      extra = ActiveSupport::Dependencies.load_once_paths - ActiveSupport::Dependencies.load_paths
       unless extra.empty?
         abort <<-end_error
           load_once_paths must be a subset of the load_paths.
@@ -233,7 +233,7 @@ def add_support_load_paths
     end
 
     # Adds all load paths from plugins to the global set of load paths, so that
-    # code from plugins can be required (explicitly or automatically via Dependencies).
+    # code from plugins can be required (explicitly or automatically via ActiveSupport::Dependencies).
     def add_plugin_load_paths
       plugin_loader.add_plugin_load_paths
     end
@@ -415,7 +415,7 @@ def initialize_routing
     # Sets the dependency loading mechanism based on the value of
     # Configuration#cache_classes.
     def initialize_dependency_mechanism
-      Dependencies.mechanism = configuration.cache_classes ? :require : :load
+      ActiveSupport::Dependencies.mechanism = configuration.cache_classes ? :require : :load
     end
 
     # Loads support for "whiny nil" (noisy warnings when methods are invoked
@@ -601,12 +601,12 @@ def plugins=(plugins)
     # If <tt>reload_plugins?</tt> is false, add this to your plugin's <tt>init.rb</tt>
     # to make it reloadable:
     #
-    #   Dependencies.load_once_paths.delete lib_path
+    #   ActiveSupport::Dependencies.load_once_paths.delete lib_path
     #
     # If <tt>reload_plugins?</tt> is true, add this to your plugin's <tt>init.rb</tt>
     # to only load it once:
     #
-    #   Dependencies.load_once_paths << lib_path
+    #   ActiveSupport::Dependencies.load_once_paths << lib_path
     #
     attr_accessor :reload_plugins
 
diff --git a/railties/lib/rails/plugin/loader.rb b/railties/lib/rails/plugin/loader.rb
index 1e542dd038b28..948d497007359 100644
--- a/railties/lib/rails/plugin/loader.rb
+++ b/railties/lib/rails/plugin/loader.rb
@@ -45,9 +45,9 @@ def add_plugin_load_paths
         plugins.each do |plugin|
           plugin.load_paths.each do |path|
             $LOAD_PATH.insert(application_lib_index + 1, path)
-            Dependencies.load_paths      << path
+            ActiveSupport::Dependencies.load_paths      << path
             unless Rails.configuration.reload_plugins?
-              Dependencies.load_once_paths << path
+              ActiveSupport::Dependencies.load_once_paths << path
             end
           end
         end