diff --git a/ChangeLog b/ChangeLog
index 15ab47db4c..be51e36e83 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jan 20 11:31:07 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* tool/redmine-backporter.rb: update usage.
+
 Tue Jan 20 11:23:47 2015  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* tool/redmine-backporter.rb (mygets): to support Backspace
diff --git a/tool/redmine-backporter.rb b/tool/redmine-backporter.rb
index 847c243c64..2e5d7d32e5 100755
--- a/tool/redmine-backporter.rb
+++ b/tool/redmine-backporter.rb
@@ -444,7 +444,8 @@ eom
   when 'help'
     puts 'ls                     '.color(bold: true) + ' show all required tickets'
     puts 'show TICKET            '.color(bold: true) + ' show the detail of the TICKET, and select it'
-    puts 'TICKET                 '.color(bold: true) + ' show the backport option of the selected ticket for merger.rb'
+    puts 'TICKET                 '.color(bold: true) + ' show the backport option of the TICKET for merger.rb'
+    puts 'rel REVISION           '.color(bold: true) + ' add the selected ticket as related to the REVISION'
     puts 'done [TICKET] [-- NOTE]'.color(bold: true) + ' set Backport field of the TICKET to DONE'
     puts 'close [TICKET]         '.color(bold: true) + ' close the TICKET'
     puts 'last [TICKET]          '.color(bold: true) + ' show the last journal of the TICKET'