diff --git a/ChangeLog b/ChangeLog
index 94bcb9340c..905ca83b2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,22 +1,10 @@
-Sat Oct  8 19:45:16 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Sat Oct  8 19:49:42 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
-	* lib/scanf.rb (Scanf::FormatSpecifier#letter, #width): use matched
-	  substring directly.
-
-	* ext/nkf/lib/kconv.rb (Kconv.conv): get rid of nil.to_a.
-
-	* test/ruby/test_assignment.rb, test/ruby/test_iterator.rb: followed
-	  change of sample/test.rb.
-
-	* test/net/http/test_http.rb: removed superfluous splatting stars.
-
-Sat Oct  8 19:32:56 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+	* eval.c (Init_Binding): add Binding#dup method.  [yarv-dev:666]
 
 	* io.c (rb_io_init_copy): clear PREP flag for copied IO.
 	  fixed: [ruby-dev:27371]
 
-Sat Oct  8 19:15:02 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
 	* parse.y (rb_parser_malloc, rb_parser_free): manage parser stack on
 	  heap.  [ruby-list:41199]
 
@@ -26,6 +14,16 @@ Sat Oct  8 19:15:02 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/iconv/charset_alias.rb: parse config.charset_alias file directly.
 
+	* ext/nkf/lib/kconv.rb (Kconv.conv): get rid of nil.to_a.
+
+	* lib/scanf.rb (Scanf::FormatSpecifier#letter, #width): use matched
+	  substring directly.
+
+	* test/ruby/test_assignment.rb, test/ruby/test_iterator.rb: followed
+	  change of sample/test.rb.
+
+	* test/net/http/test_http.rb: removed superfluous splatting stars.
+
 Thu Oct  6 20:10:38 2005  Minero Aoki  <aamine@loveruby.net>
 
 	* ext/strscan/strscan.c (strscan_free): remove useless code.
diff --git a/eval.c b/eval.c
index 54ca11cfa6..47d968830b 100644
--- a/eval.c
+++ b/eval.c
@@ -9392,6 +9392,7 @@ Init_Binding(void)
     rb_undef_alloc_func(rb_cBinding);
     rb_undef_method(CLASS_OF(rb_cBinding), "new");
     rb_define_method(rb_cBinding, "clone", proc_clone, 0);
+    rb_define_method(rb_cBinding, "dup", proc_dup, 0);
     rb_define_method(rb_cBinding, "eval", bind_eval, -1);
     rb_define_global_function("binding", rb_f_binding, 0);
 }