diff --git a/ChangeLog b/ChangeLog
index 7b352bdee3..ffae1cb420 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Dec 30 19:43:00 2009  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* include/ruby/ruby.h (RREGEXP_SRC_END): added.
+
 Wed Dec 30 19:40:00 2009  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* include/ruby/defines.h (INFINITY): this is float.
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 568d61ab47..5318772b35 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -684,6 +684,7 @@ struct RRegexp {
 #define RREGEXP_SRC(r) RREGEXP(r)->src
 #define RREGEXP_SRC_PTR(r) RSTRING_PTR(RREGEXP(r)->src)
 #define RREGEXP_SRC_LEN(r) RSTRING_LEN(RREGEXP(r)->src)
+#define RREGEXP_SRC_END(r) RSTRING_END(RREGEXP(r)->src)
 
 struct RHash {
     struct RBasic basic;