fixed typo, fixes #3794

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/models/calendar/CalendarDate.class.php b/lib/models/calendar/CalendarDate.class.php
index 23ea8af..d5b9627 100644
--- a/lib/models/calendar/CalendarDate.class.php
+++ b/lib/models/calendar/CalendarDate.class.php
@@ -254,7 +254,7 @@ class CalendarDate extends SimpleORMap implements PrivacyObject
             ['calendar_date_id' => $this->id]
         );
         foreach ($course_assignments as $course_assignment) {
-            if ($course_assignment->course->calendarWritable($range_id)) {
+            if ($course_assignment->course->isCalendarWritable($range_id)) {
                 return true;
             }
         }