diff --git a/ChangeLog b/ChangeLog
index dfdf9e318c..ac779707f0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Jul  9 15:16:02 2013  Akinori MUSHA  <knu@iDaemons.org>
+
+	* test/fileutils/fileasserts.rb
+	  (Test::Unit::FileAssertions#assert_not_symlink): Add a missing
+	  optional argument "message".
+
 Tue Jul  9 15:03:24 2013  Akinori MUSHA  <knu@iDaemons.org>
 
 	* lib/fileutils.rb (FileUtils#chown, FileUtils#chown_R): If user
diff --git a/test/fileutils/fileasserts.rb b/test/fileutils/fileasserts.rb
index 0aa139fe16..e78deee06c 100644
--- a/test/fileutils/fileasserts.rb
+++ b/test/fileutils/fileasserts.rb
@@ -34,7 +34,7 @@ module Test
         assert(File.symlink?(path), "is not a symlink: #{path}#{message&&': '}#{message||''}")
       end
 
-      def assert_not_symlink(path)
+      def assert_not_symlink(path, message=nil)
         assert(!File.symlink?(path), "is a symlink: #{path}#{message&&': '}#{message||''}")
       end