diff --git a/ext/calendar/calendar.c b/ext/calendar/calendar.c
index 3baccadd48c..54429c80bb8 100644
--- a/ext/calendar/calendar.c
+++ b/ext/calendar/calendar.c
@@ -238,7 +238,7 @@ PHP_FUNCTION(jdtogregorian)
 }
 /* }}} */
 
-/* {{{ proto mixed jddayofweek(int juliandaycount, [int mode])
+/* {{{ proto mixed jddayofweek(int juliandaycount [, int mode])
    Returns name or number of day of week from julian day count */
  PHP_FUNCTION(jddayofweek)
 {