diff --git a/Formula/nmap.rb b/Formula/nmap.rb
index d4094eea58..a2c14cb72c 100644
--- a/Formula/nmap.rb
+++ b/Formula/nmap.rb
@@ -4,6 +4,7 @@ class Nmap < Formula
   url 'http://nmap.org/dist/nmap-5.51.tar.bz2'
   homepage 'http://nmap.org/5/'
   md5 '0b80d2cb92ace5ebba8095a4c2850275'
+  head 'svn://guest:@svn.insecure.org/nmap/', :using => :svn
 
   # Leopard's version of OpenSSL isn't new enough
   depends_on "openssl" if MacOS.leopard?