diff --git a/Library/Homebrew/blacklist.rb b/Library/Homebrew/blacklist.rb
index dd9913f76f..8770815c12 100644
--- a/Library/Homebrew/blacklist.rb
+++ b/Library/Homebrew/blacklist.rb
@@ -1,8 +1,11 @@
 def blacklisted? name
   case name.downcase
-  when 'screen', /^rubygems?$/, 'libpcap' then <<-EOS.undent
+  when 'screen', /^rubygems?$/, then <<-EOS.undent
     Apple distributes #{name} with OS X, you can find it in /usr/bin.
     EOS
+  when 'libpcap' then <<-EOS.undent
+    Apple distributes #{name} with OS X, you can find it in /usr/lib.
+    EOS
   when 'libiconv' then <<-EOS.undent
     Apple distributes #{name} with OS X, you can find it in /usr/lib.
     Some build scripts fail to detect it correctly, please check existing