diff --git a/ChangeLog b/ChangeLog
index b800fcd68d..7a3ef1d7e0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jun  8 15:33:30 2010  URABE Shyouhei  <shyouhei@ruby-lang.org>
+
+	* lib/fileutils.rb (FileUtils::cp_r): dup needed here; options are
+	  destroyed otherwise.
+
 Tue Jun  8 15:27:00 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* eval.c (search_required): expand home relative path first.
diff --git a/lib/fileutils.rb b/lib/fileutils.rb
index 3ef80ed601..d6b6cd2d7a 100644
--- a/lib/fileutils.rb
+++ b/lib/fileutils.rb
@@ -418,6 +418,7 @@ module FileUtils
     fu_check_options options, OPT_TABLE['cp_r']
     fu_output_message "cp -r#{options[:preserve] ? 'p' : ''}#{options[:remove_destination] ? ' --remove-destination' : ''} #{[src,dest].flatten.join ' '}" if options[:verbose]
     return if options[:noop]
+    options = options.dup
     options[:dereference_root] = true unless options.key?(:dereference_root)
     fu_each_src_dest(src, dest) do |s, d|
       copy_entry s, d, options[:preserve], options[:dereference_root], options[:remove_destination]
diff --git a/version.h b/version.h
index 6a0f5a0c9f..82297f7034 100644
--- a/version.h
+++ b/version.h
@@ -2,7 +2,7 @@
 #define RUBY_RELEASE_DATE "2010-06-08"
 #define RUBY_VERSION_CODE 187
 #define RUBY_RELEASE_CODE 20100608
-#define RUBY_PATCHLEVEL 275
+#define RUBY_PATCHLEVEL 276
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8