diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 852e85b801..c104a743b0 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -221,8 +221,7 @@ class Formula
   # rarely, you don't want your library symlinked into the main prefix
   # see gettext.rb for an example
   def keg_only?
-    kor = self.class.keg_only_reason
-    not kor.nil? and kor.valid?
+    keg_only_reason && keg_only_reason.valid?
   end
 
   def keg_only_reason