diff --git a/calendar/inc/class.holidaycalc_JP.inc.php b/calendar/inc/class.holidaycalc_JP.inc.php
index 1f1b549cbb..14278dc27b 100755
--- a/calendar/inc/class.holidaycalc_JP.inc.php
+++ b/calendar/inc/class.holidaycalc_JP.inc.php
@@ -21,7 +21,7 @@
 	 */
 	class holidaycalc
 	{
-		function calculate_date($holiday, &$holidays, $year, &$i)
+		function calculate_date($holiday, &$holidays, $year)
 		{
 			static	$cached_month;
 			static	$cached_day;