diff --git a/actionpack/lib/sprockets/helpers/rails_helper.rb b/actionpack/lib/sprockets/helpers/rails_helper.rb
index 3b64be67d9..9c27133d9e 100644
--- a/actionpack/lib/sprockets/helpers/rails_helper.rb
+++ b/actionpack/lib/sprockets/helpers/rails_helper.rb
@@ -12,6 +12,12 @@ module Sprockets
         end
       end
 
+      def asset_path(source, default_ext = nil, body = false)
+        source = source.logical_path if source.respond_to?(:logical_path)
+        path = asset_paths.compute_public_path(source, 'assets', default_ext, true)
+        body ? "#{path}?body=1" : path
+      end
+
       def javascript_include_tag(source, options = {})
         debug = options.key?(:debug) ? options.delete(:debug) : debug_assets?
         body  = options.key?(:body)  ? options.delete(:body)  : false