1 files changed, 1 insertions, 1 deletions

diff --git a/public/static/js/map-refresh.js b/public/static/js/map-refresh.js
index 1d8453a..c54f428 100644
--- a/public/static/js/map-refresh.js
+++ b/public/static/js/map-refresh.js
@@ -69,7 +69,7 @@ function dbf_anim_fine() {
 
 function dbf_map_reload() {
 	const param = new URLSearchParams(window.location.search);
-	$.get('/_ajax_mapinfo/' + j_reqid + '?efa=' + param.get('efa') + '&hafas=' + param.get('hafas'), function(data) {
+	$.get('/_ajax_mapinfo/' + j_reqid + '?efa=' + (param.get('efa') || '') + '&hafas=' + (param.get('hafas') || ''), function(data) {
 		$('#infobox').html(data);
 		dbf_map_parse();
 		setTimeout(dbf_map_reload, 61000);