diff --git a/Library/Homebrew/blacklist.rb b/Library/Homebrew/blacklist.rb
index 4b219d1fe7..cab396c8d1 100644
--- a/Library/Homebrew/blacklist.rb
+++ b/Library/Homebrew/blacklist.rb
@@ -42,6 +42,12 @@ def blacklisted? name
 
         easy_install pip
     EOS
+  when 'macruby' then <<-EOS.undent
+    MacRuby works better when you install their package:
+      http://www.macruby.org/downloads.html
+
+    Although if you prefer, there is a formula in homebrew-alt.
+    EOS
   when 'npm' then <<-EOS.undent
     npm can be installed thusly by following the instructions at
       http://npmjs.org/