diff --git a/Library/Homebrew/download_strategy.rb b/Library/Homebrew/download_strategy.rb
index a265e0b355..17b72efd37 100644
--- a/Library/Homebrew/download_strategy.rb
+++ b/Library/Homebrew/download_strategy.rb
@@ -195,6 +195,7 @@ class SubversionDownloadStrategy <AbstractDownloadStrategy
   def initialize url, name, version, specs
     super
     @unique_token="#{name}--svn" unless name.to_s.empty? or name == '__UNKNOWN__'
+    @unique_token += "--HEAD" if ARGV.include? '--HEAD'
     @co=HOMEBREW_CACHE+@unique_token
   end