diff --git a/lisp/ox-icalendar.el b/lisp/ox-icalendar.el
index 49299b0..39ba383 100644
--- a/lisp/ox-icalendar.el
+++ b/lisp/ox-icalendar.el
@@ -261,6 +261,7 @@ re-read the iCalendar file.")
 		     (inlinetask . ignore)
 		     (planning . ignore)
 		     (section . ignore)
+		     (inner-template . org-icalendar-inner-template)
 		     (template . org-icalendar-template))
   :options-alist
   '((:exclude-tags
@@ -747,7 +748,18 @@ END:VALARM\n"
 		 (if (zerop alarm-time) org-icalendar-alarm-time alarm-time)))))
 
 
-;;;; Template
+;;;; Templates
+
+(defun org-icalendar-inner-template (contents info)
+  "Return inner contents string after iCalendar conversion.
+CONTENTS is the transcoded contents string. INFO is a plist used
+as a communication channel.
+
+This function just returns CONTENTS unchanged.  Its purpose is to
+override the inner-template transcoder of the ascii
+backend (`org-ascii-inner-template'), which appends footnotes
+that break the iCalendar format."
+  contents)
 
 (defun org-icalendar-template (contents info)
   "Return complete document string after iCalendar conversion.