3 files changed, 5 insertions, 4 deletions
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index 2e412147d3..cbb2d23238 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -91,7 +91,7 @@ module Rails
       @routes_reloader ||= RoutesReloader.new
     end
 
-    def initialize!(group=nil)
+    def initialize!(group=:default)
       raise "Application has been already initialized." if @initialized
       run_initializers(group, self)
       @initialized = true
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 0e1e719596..2d25273050 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -542,7 +542,7 @@ module Rails
       require environment if environment
     end
 
-    initializer :append_assets_path, :group => :assets do |app|
+    initializer :append_assets_path, :group => :all do |app|
       app.config.assets.paths.unshift(*paths["vendor/assets"].existent_directories)
       app.config.assets.paths.unshift(*paths["lib/assets"].existent_directories)
       app.config.assets.paths.unshift(*paths["app/assets"].existent_directories)
diff --git a/railties/lib/rails/initializable.rb b/railties/lib/rails/initializable.rb
index 4c1da0a5a5..04d5b55c69 100644
--- a/railties/lib/rails/initializable.rb
+++ b/railties/lib/rails/initializable.rb
@@ -10,6 +10,7 @@ module Rails
       attr_reader :name, :block
 
       def initialize(name, context, options, &block)
+        options[:group] ||= :default
         @name, @context, @options, @block = name, context, options, block
       end
 
@@ -48,10 +49,10 @@ module Rails
       end
     end
 
-    def run_initializers(group=nil, *args)
+    def run_initializers(group=:default, *args)
       return if instance_variable_defined?(:@ran)
       initializers.tsort.each do |initializer|
-        initializer.run(*args) if group.nil? || initializer.belongs_to?(group)
+        initializer.run(*args) if initializer.belongs_to?(group)
       end
       @ran = true
     end