diff --git a/tool/downloader.rb b/tool/downloader.rb
index 51e4217bb0..8f37c9823f 100644
--- a/tool/downloader.rb
+++ b/tool/downloader.rb
@@ -8,7 +8,7 @@ class Downloader
   end
 
   class RubyGems < self
-    def self.download(url, name, dir = nil, ims = true, options = {})
+    def self.download(name, dir = nil, ims = true, options = {})
       options[:ssl_ca_cert] = Dir.glob(File.expand_path("../lib/rubygems/ssl_certs/*.pem", File.dirname(__FILE__)))
       super("https://rubygems.org/downloads/#{name}", name, dir, ims, options)
     end