diff --git a/ChangeLog b/ChangeLog
index 01dc6a97d8..3a12005f91 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,7 @@
 Wed Apr  8 19:18:02 2015  Shota Fukumori (sora_h)  <her@sorah.jp>
 
 	* enum.c (enum_grep_v, grep_i, grep_iter_i, Init_enum):
-	  Implement Enumerable#grep_v.
+	  Implement Enumerable#grep_v. [Feature #11049]
 
 Thu May 14 15:54:13 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>