diff --git a/Formula/md.rb b/Formula/md.rb
index fdd75798567..043493b32bc 100644
--- a/Formula/md.rb
+++ b/Formula/md.rb
@@ -6,7 +6,7 @@ class Md < Formula
   sha1 '0128de65a4da2ef9655f3b1e6a94d2f8ae292414'
 
   # OS X up to and including Lion 10.7 includes 'md'
-  keg_only :provided_by_osx unless MacOS.version >= :mountain_lion
+  keg_only :provided_pre_mountain_lion
 
   def install
     cd 'md' do
diff --git a/Formula/texi2html.rb b/Formula/texi2html.rb
index 0affa256d23..40404183aa6 100644
--- a/Formula/texi2html.rb
+++ b/Formula/texi2html.rb
@@ -5,7 +5,7 @@ class Texi2html < Formula
   url 'http://download.savannah.gnu.org/releases/texi2html/texi2html-1.82.tar.gz'
   sha1 'e7bbe1197147566250abd5c456b94c8e37e0a81f'
 
-  keg_only :provided_by_osx unless MacOS.version >= :mountain_lion
+  keg_only :provided_pre_mountain_lion
 
   def install
     system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}",