diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index 027b9d4585..1e12d712e1 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -29,6 +29,8 @@ class Keg < Pathname
 
   def unlink
     n=0
+    return n if !linked?
+
     %w[bin etc lib include sbin share var].map{ |d| self/d }.each do |src|
       next unless src.exist?
       src.find do |src|