diff --git a/lisp/ox-icalendar.el b/lisp/ox-icalendar.el
index 49299b0..ceb2df0 100644
--- a/lisp/ox-icalendar.el
+++ b/lisp/ox-icalendar.el
@@ -266,6 +266,7 @@ re-read the iCalendar file.")
   '((:exclude-tags
      "ICALENDAR_EXCLUDE_TAGS" nil org-icalendar-exclude-tags split)
     (:with-timestamps nil "<" org-icalendar-with-timestamps)
+    (:with-footnotes nil "f" nil)
     (:with-vtodo nil nil org-icalendar-include-todo)
     ;; The following property will be non-nil when export has been
     ;; started from org-agenda-mode.  In this case, any entry without