diff --git a/ChangeLog b/ChangeLog
index 97ce4364716328..e907d63f9ca5a7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb  8 09:49:58 2012  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* tool/merger.rb: don't abort, update first.
+
 Wed Feb 08 09:57:33 2012  Martin Bosslet  <Martin.Bosslet@googlemail.com>
 
 	* ext/openssl/ossl_asn1.c: Call INT2NUM only once for GeneralString.
diff --git a/tool/merger.rb b/tool/merger.rb
index 673f7b1876f87d..d8ae16016b1e30 100755
--- a/tool/merger.rb
+++ b/tool/merger.rb
@@ -125,10 +125,7 @@ def default_merge_branch
   help
   exit
 else
-  unless `svn st`.empty?
-    puts 'this working directory is not clean'
-    abort
-  end
+  system 'svn up'
 
   q = $repos + (ARGV[1] || default_merge_branch)
   revs = ARGV[0].split /,\s*/
@@ -204,7 +201,6 @@ def default_merge_branch
 
   if system *%w'svn ci -F' + [f.path]
     # tag :interactive # no longer needed.
-    system 'svn up'
     system 'rm -f subversion.commitlog'
   else
     puts 'commit failed; try again.'