diff --git a/Library/Homebrew/formula_creator.rb b/Library/Homebrew/formula_creator.rb
index 7efac2f9fe..da12d7a8c7 100644
--- a/Library/Homebrew/formula_creator.rb
+++ b/Library/Homebrew/formula_creator.rb
@@ -12,7 +12,7 @@ module Homebrew
     attr_reader :url, :sha256, :desc, :homepage
     attr_accessor :name, :version, :tap, :mode, :license
 
-    def initialize(name, version, fetch=true, head=false)
+    def initialize(name, version, fetch, head)
       @name = name
       @version = Version.new(version) if version
       @fetch = fetch