diff --git a/gtk/gtkcalendar.c b/gtk/gtkcalendar.c
index 4a0fea6e76..5db4f4170f 100644
--- a/gtk/gtkcalendar.c
+++ b/gtk/gtkcalendar.c
@@ -3925,10 +3925,10 @@ gtk_calendar_unmark_day (GtkCalendar *calendar,
 /**
  * gtk_calendar_get_date:
  * @calendar: a #GtkCalendar
- * @year: (allow-none): location to store the year number, or %NULL
- * @month: (allow-none): location to store the month number (between 0 and 11), or %NULL
- * @day: (allow-none): location to store the day number (between 1 and 31), or %NULL
- * 
+ * @year: (out) (allow-none): location to store the year as a decimal number (e.g. 2011), or %NULL
+ * @month: (out) (allow-none): location to store the month number (between 0 and 11), or %NULL
+ * @day: (out) (allow-none): location to store the day number (between 1 and 31), or %NULL
+ *
  * Obtains the selected date from a #GtkCalendar.
  **/
 void