diff --git a/ChangeLog b/ChangeLog
index 5c1cee9824..b6d2f3a3a4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Apr 22 15:04:56 2016  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* tool/redmine-backporter.rb: the fullpath of merger.rb is too long to
+	  copy&paste on Windows.  show shorter name instead on the platform.
+	  I'm sure that the user of this command on Windows is only me.
+
 Fri Apr 22 14:52:04 2016  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* tool/merger.rb: remove temporary file.
diff --git a/tool/redmine-backporter.rb b/tool/redmine-backporter.rb
index 0806e63f24..01ec04225e 100755
--- a/tool/redmine-backporter.rb
+++ b/tool/redmine-backporter.rb
@@ -300,7 +300,7 @@ def show_last_journal(http, uri)
 end
 
 def merger_path
-  File.expand_path('../merger.rb', __FILE__)
+  RUBY_PLATFORM =~ /mswin|mingw/ ? 'merger' : File.expand_path('../merger.rb', __FILE__)
 end
 
 def backport_command_string