diff --git a/actionpack/lib/sprockets/assets.rake b/actionpack/lib/sprockets/assets.rake
index a8128d9a82..893ecf58fe 100644
--- a/actionpack/lib/sprockets/assets.rake
+++ b/actionpack/lib/sprockets/assets.rake
@@ -26,6 +26,8 @@ namespace :assets do
         env.each_logical_path do |logical_path|
           if path.is_a?(Regexp)
             next unless path.match(logical_path)
+          elsif path.is_a?(Proc)
+            next unless path.call(logical_path)
           else
             next unless File.fnmatch(path.to_s, logical_path)
           end
diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index 0ca664e4f0..a48db3b6d2 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -37,7 +37,8 @@ module Rails
         @assets = ActiveSupport::OrderedOptions.new
         @assets.enabled         = false
         @assets.paths           = []
-        @assets.precompile      = [ /\w+\.(?!js|css).+/, /application.(css|js)$/ ]
+        @assets.precompile      = [ Proc.new{ |path| !File.extname(path).in?(['.js', '.css']) },
+                                    /application.(css|js)$/ ]
         @assets.prefix          = "/assets"
         @assets.version         = ''
         @assets.debug           = false
diff --git a/railties/test/application/assets_test.rb b/railties/test/application/assets_test.rb
index b9d8c002d7..b8a8665b3e 100644
--- a/railties/test/application/assets_test.rb
+++ b/railties/test/application/assets_test.rb
@@ -64,6 +64,34 @@ module ApplicationTests
       end
     end
 
+    test "precompile application.js and application.css and all other files not ending with .js or .css by default" do
+      app_file "app/assets/javascripts/application.js", "alert();"
+      app_file "app/assets/stylesheets/application.css", "body{}"
+      app_file "app/assets/javascripts/something.min.js", "alert();"
+      app_file "app/assets/stylesheets/something.min.css", "body{}"
+
+      images_should_compile = ["a.png", "happyface.png", "happy_face.png", "happy.face.png",
+                               "happy-face.png", "happy.happy_face.png", "happy_happy.face.png", 
+                               "happy.happy.face.png", "happy", "happy.face", "-happyface",
+                               "-happy.png", "-happy.face.png", "_happyface", "_happy.face.png",
+                               "_happy.png"]
+      images_should_compile.each do |filename|
+        app_file "app/assets/images/#{filename}", "happy"
+      end
+
+      capture(:stdout) do
+        Dir.chdir(app_path){ `bundle exec rake assets:precompile` }
+      end
+
+      images_should_compile.each do |filename|
+        assert File.exists?("#{app_path}/public/assets/#{filename}")
+      end
+      assert File.exists?("#{app_path}/public/assets/application.js")
+      assert File.exists?("#{app_path}/public/assets/application.css")
+      assert !File.exists?("#{app_path}/public/assets/something.min.js")
+      assert !File.exists?("#{app_path}/public/assets/something.min.css")
+    end
+
     test "asset pipeline should use a Sprockets::Index when config.assets.digest is true" do
       add_to_config "config.assets.digest = true"
       add_to_config "config.action_controller.perform_caching = false"