--- xchat-ruby-1.2-src/src/Makefile.rbconfig	2015-01-16 15:59:36.154426689 +0900
+++ xchat-ruby-1.2-src/src/Makefile	2015-01-16 16:00:33.272758195 +0900
@@ -4,7 +4,7 @@
 
 OBJ=xchat-ruby.o
 
-ARCHDIR=`$(RUBY) -rrbconfig -e "puts Config::CONFIG['archdir']"`
+ARCHDIR=`$(RUBY) -rrbconfig -e "puts RbConfig::CONFIG['archdir']"`
 
 XCHAT_RUBY=xchat-ruby
 SO_FILE=$(XCHAT_RUBY).so
--- xchat-ruby-1.2-src/src/win32/make.rb.rbconfig	2007-04-26 20:16:32.000000000 +0900
+++ xchat-ruby-1.2-src/src/win32/make.rb	2015-01-16 16:00:45.426615950 +0900
@@ -9,8 +9,8 @@
 end
 
 
-$archdir = Config::CONFIG['archdir']
-$libs    = Config::CONFIG['LIBS']
+$archdir = RbConfig::CONFIG['archdir']
+$libs    = RbConfig::CONFIG['LIBS']
 
 # first, process the header file
 puts "Building 'xchat-ruby-plugin.h'..."