diff --git a/ChangeLog b/ChangeLog
index 23830a0e2b..aa8a891a5b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Feb 20 17:37:26 2006  Tanaka Akira  <akr@m17n.org>
+
+	* mkconfig.rb: alias RbConfig for Config.
+
 Mon Feb 20 12:27:53 2006  Kent Sibilev  <ksruby@gmail.com>
 
 	* lib/rational.rb (Integer::gcd): small typo fix.
diff --git a/mkconfig.rb b/mkconfig.rb
index bce0021669..1e91d65820 100644
--- a/mkconfig.rb
+++ b/mkconfig.rb
@@ -136,6 +136,7 @@ print <<EOS
     Config::expand(val)
   end
 end
+RbConfig = Config # compatibility for ruby-1.9
 CROSS_COMPILING = nil unless defined? CROSS_COMPILING
 EOS