diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index b0f6f0e7b0..f9aba2e0ee 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -30,6 +30,7 @@ class Keg < Pathname
   def unlink
     n=0
     %w[bin etc lib include sbin share var].map{ |d| self/d }.each do |src|
+      next unless src.exist?
       src.find do |src|
         next if src == self
         dst=HOMEBREW_PREFIX+src.relative_path_from(self)