diff --git a/ChangeLog b/ChangeLog
index 604daef2f8..89b2c823c3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Feb 23 10:19:41 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* include/ruby/ruby.h (USE_SYMBOL_AS_METHOD_NAME): Module#methods,
+	  #singleton_methods and so on return Symbols.  [ruby-talk:328775]
+
 Mon Feb 23 10:15:35 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* README.EXT, README.EXT.ja: added macros for the Compatibilities.
diff --git a/README.EXT b/README.EXT
index 17467477ce..6844947fc9 100644
--- a/README.EXT
+++ b/README.EXT
@@ -1276,6 +1276,11 @@ have_func("rb_reg_new_str", "ruby.h").
 
 Means that type rb_io_t is provided.
 
+ USE_SYMBOL_AS_METHOD_NAME
+
+Means that Symbols will be returned as method names, e.g.,
+Module#methods, #singleton_methods and so on.
+
 
 Appendix C. Functions Available in extconf.rb
 
diff --git a/README.EXT.ja b/README.EXT.ja
index 71ac60e6ac..42f35249c0 100644
--- a/README.EXT.ja
+++ b/README.EXT.ja
@@ -1376,6 +1376,12 @@ HAVE_RB_IO_T
 
   rb_io_t 型が提供されていることを意味する．
 
+USE_SYMBOL_AS_METHOD_NAME
+
+  メソッド名を返すメソッド，Module#methods, #singleton_methods
+  などがSymbolを返すことを意味する．
+
+
 Appendix C. extconf.rbで使える関数たち
 
 extconf.rbの中では利用可能なコンパイル条件チェックの関数は以
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 1dcff00a6a..4f28b9d698 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -286,6 +286,9 @@ VALUE rb_ull2inum(unsigned LONG_LONG);
 #define ID2SYM(x) (((VALUE)(x)<<RUBY_SPECIAL_SHIFT)|SYMBOL_FLAG)
 #define SYM2ID(x) RSHIFT((unsigned long)x,RUBY_SPECIAL_SHIFT)
 
+/* Module#methods, #singleton_methods and so on return Symbols */
+#define USE_SYMBOL_AS_METHOD_NAME 1
+
 /* special constants - i.e. non-zero and non-fixnum constants */
 enum ruby_special_consts {
     RUBY_Qfalse = 0,