diff --git a/ChangeLog b/ChangeLog
index 6e83335262..643241c842 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,7 @@
 Fri Oct  5 21:24:59 2007  Tanaka Akira  <akr@fsij.org>
 
 	* re.c (rb_reg_s_union_m): Regexp.union accepts single argument which
-	  is an array of patterns. 
+	  is an array of patterns.  [ruby-list:44084]
 
 Fri Oct  5 16:42:27 2007  Tanaka Akira  <akr@fsij.org>