diff --git a/lisp/ox-icalendar.el b/lisp/ox-icalendar.el
index aefddf8ba..b31e882cf 100644
--- a/lisp/ox-icalendar.el
+++ b/lisp/ox-icalendar.el
@@ -77,7 +77,7 @@ for timed events.  If non-zero, alarms are created.
 (defcustom org-icalendar-exclude-tags nil
   "Tags that exclude a tree from export.
 This variable allows to specify different exclude tags from other
-back-ends.  It can also be set with the ICAL_EXCLUDE_TAGS
+back-ends.  It can also be set with the ICALENDAR_EXCLUDE_TAGS
 keyword."
   :group 'org-export-icalendar
   :type '(repeat (string :tag "Tag")))