Rakefile in berkshelf-7.0.7 vs Rakefile in berkshelf-7.0.8

@@ -6,10 +6,10 @@
 rescue LoadError
   puts "Rspec not available"
   task :spec
 end
 
-WINDOWS_PLATFORM = /mswin|win32|mingw/ unless defined? WINDOWS_PLATFORM
+WINDOWS_PLATFORM = /mswin|win32|mingw/.freeze unless defined? WINDOWS_PLATFORM
 
 begin
   require "cucumber"
   require "cucumber/rake/task"
   Cucumber::Rake::Task.new(:features) do |t|