formula_cellar_checks: Ruby 1.8 compatible check.

1 files changed, 1 insertions, 1 deletions

diff --git a/Library/Homebrew/formula_cellar_checks.rb b/Library/Homebrew/formula_cellar_checks.rb
index a5d9beda0..da14f38e1 100644
--- a/Library/Homebrew/formula_cellar_checks.rb
+++ b/Library/Homebrew/formula_cellar_checks.rb
@@ -150,7 +150,7 @@ module FormulaCellarChecks
   private
 
   def relative_glob(dir, pattern)
-    return [] unless Dir.exist? dir
+    return [] unless Pathname.new(dir).directory?
     Dir.chdir(dir) { Dir[pattern] }
   end
 end