diff --git a/sprockets-umodule.gemspec b/sprockets-umodule.gemspec
index 1f2988e..8525982 100644
--- a/sprockets-umodule.gemspec
+++ b/sprockets-umodule.gemspec
@@ -1,5 +1,5 @@
 # -*- encoding: utf-8 -*-
-$:.push File.expand_path('../lib', __FILE__)
+$LOAD_PATH.push File.expand_path('../lib', __FILE__)
 require 'sprockets/umodule/version'
 
 Gem::Specification.new do |s|