diff --git a/koha-tmpl/intranet-tmpl/prog/en/includes/calendar.inc b/koha-tmpl/intranet-tmpl/prog/en/includes/calendar.inc
index 9f1cdb6ceb..95234ba8e3 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/includes/calendar.inc
+++ b/koha-tmpl/intranet-tmpl/prog/en/includes/calendar.inc
@@ -74,7 +74,7 @@
                     .addClass("clear_date")
                     .on("click", function(e){
                         e.preventDefault();
-                        instance.input.flatpickr().clear();
+                        instance.setDate('');
                     })
                     .addClass("fa fa-fw fa-times")
                     .attr("aria-hidden", true)