diff --git a/ChangeLog b/ChangeLog
index 5ac0e5db09..65a52edaf3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Apr 16 01:33:27 2016  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
+
+	* tool/redmine-backporter.rb: sort revisions.
+
 Sat Apr 16 01:16:02 2016  Tanaka Akira  <akr@fsij.org>
 
 	* array.c (rb_ary_sum): Don't yield same element twice.
diff --git a/tool/redmine-backporter.rb b/tool/redmine-backporter.rb
index aedd2d3d36..7323d37fa1 100755
--- a/tool/redmine-backporter.rb
+++ b/tool/redmine-backporter.rb
@@ -316,7 +316,7 @@ def backport_command_string
     end
     @changesets.define_singleton_method(:validated){true}
   end
-  " #{merger_path} --ticket=#{@issue} #{@changesets.join(',')}"
+  " #{merger_path} --ticket=#{@issue} #{@changesets.sort.join(',')}"
 end
 
 def status_char(obj)