diff --git a/Library/Homebrew/formulary.rb b/Library/Homebrew/formulary.rb
index 3d3d7930b17eb38768e954cdf12e194333554ea5..31a7fd51ecd9927ffc9a3958facc2a4915fc5954 100644
--- a/Library/Homebrew/formulary.rb
+++ b/Library/Homebrew/formulary.rb
@@ -60,7 +60,7 @@ class Formulary
       end
 
       unless have_klass
-        puts "#{$0} (#{self.class.name}): loading #{path}" if ARGV.debug?
+        STDERR.puts "#{$0} (#{self.class.name}): loading #{path}" if ARGV.debug?
         begin
           require path
         rescue NoMethodError