diff --git a/test/unit/mail_handler_test.rb b/test/unit/mail_handler_test.rb
index 21d2aed..a625404 100644
--- a/test/unit/mail_handler_test.rb
+++ b/test/unit/mail_handler_test.rb
@@ -1,3 +1,5 @@
+# encoding: utf-8
+#
 # Redmine - project management software
 # Copyright (C) 2006-2009  Jean-Philippe Lang
 #