diff --git a/pjsip-apps/src/pjsystest/systest.h b/pjsip-apps/src/pjsystest/systest.h
index 487944d..1b802fe 100644
--- a/pjsip-apps/src/pjsystest/systest.h
+++ b/pjsip-apps/src/pjsystest/systest.h
@@ -1,3 +1,21 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
 #ifndef __SYSTEST_H__
 #define __SYSTEST_H__
 
@@ -32,11 +50,13 @@
 extern "C" {
 #endif
 
+/* API, to be called by main() */
 int	    systest_init(void);
 int	    systest_run(void);
 void	    systest_save_result(const char *filename);
 void	    systest_deinit(void);
 
+/* Test item is used to record the test result */
 typedef struct test_item_t
 {
     char	title[80];