diff --git a/ChangeLog b/ChangeLog
index 72971dc40b..265cb4049b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -17,7 +17,7 @@ Sun May 13 23:38:31 2012  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
 Sun May 13 23:32:16 2012  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
 
 	* test/ruby/test_io.rb (TestIO): revert r35631. it broke the intent of
-	  test_flush_in_finalizer1.  [ruby-core:43951] [Bug ##6228]
+	  test_flush_in_finalizer1.  [ruby-core:43951] [Bug #6228]
 
 Sun May 13 22:46:36 2012  Tanaka Akira  <akr@fsij.org>