--- lib/irb/init.rb.orig	2007-10-23 17:43:49.000000000 +0200
+++ lib/irb/init.rb	2007-10-23 17:43:03.000000000 +0200
@@ -243,6 +243,9 @@
     yield proc{|rc| home+"/irb#{rc.sub(/\A_?/, '.')}"}
     yield proc{|rc| home+"/_irb#{rc}"}
     yield proc{|rc| home+"/$irb#{rc}"}
+    unless RUBY_PLATFORM =~ /mswin32|cygwin|mingw|bccwin/
+      yield proc{|rc| "/etc/irb#{rc}"}
+    end
   end
 
   # loading modules