diff --git a/ChangeLog b/ChangeLog
index 9fffb9e1fe..6c49dbb0bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb 18 15:23:34 2009  Akinori MUSHA  <knu@iDaemons.org>
+
+	* bootstraptest/runner.rb: Use RUBY_DESCRIPTION if defined.
+
 Wed Feb 18 14:33:35 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* array.c (rb_ary_resurrect), string.c (rb_str_resurrect): new
diff --git a/bootstraptest/runner.rb b/bootstraptest/runner.rb
index 23a3507bf7..aff5a54ee7 100644
--- a/bootstraptest/runner.rb
+++ b/bootstraptest/runner.rb
@@ -95,8 +95,13 @@ End
 
   unless quiet
     puts Time.now
-    patchlevel = defined?(RUBY_PATCHLEVEL) ? " patchlevel #{RUBY_PATCHLEVEL}" : ''
-    puts "Driver is ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE}#{patchlevel}) [#{RUBY_PLATFORM}]"
+    if defined?(RUBY_DESCRIPTION)
+      puts "Driver is #{RUBY_DESCRIPTION}"
+    elsif defined?(RUBY_PATCHLEVEL)
+      puts "Driver is ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE}#{RUBY_PLATFORM}) [#{RUBY_PLATFORM}]"
+    else
+      puts "Driver is ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE}) [#{RUBY_PLATFORM}]"
+    end
     puts "Target is #{`#{@ruby} -v`.chomp}"
     puts
     $stdout.flush