diff --git a/ChangeLog b/ChangeLog
index 5f21c0be59..21e6ad2bfe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Oct 22 17:29:51 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* parse.y (arg_prepend): removed.  a patch from Mikhail T. in
+	  [ruby-core:26217].
+
 Thu Oct 22 04:54:41 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* object.c (rb_obj_inspect): print instance variables only when
diff --git a/parse.y b/parse.y
index 0d5c172c4b..c611f9b538 100644
--- a/parse.y
+++ b/parse.y
@@ -522,7 +522,6 @@ static VALUE ripper_id2sym(ID);
 
 #define arg_new() dispatch0(args_new)
 #define arg_add(l,a) dispatch2(args_add, l, a)
-#define arg_prepend(l,a) dispatch2(args_prepend, l, a)
 #define arg_add_star(l,a) dispatch2(args_add_star, l, a)
 #define arg_add_block(l,b) dispatch2(args_add_block, l, b)
 #define arg_add_optblock(l,b) ((b)==Qundef? l : dispatch2(args_add_block, l, b))