diff --git a/static/js/map.js b/static/js/map.js
index f32560d..0e7f063 100644
--- a/static/js/map.js
+++ b/static/js/map.js
@@ -207,7 +207,7 @@ function checkbox_change() {
       item_isa_list.includes(isa_qid)
     );
 
-    if (intersection.length) {
+    if (item.group && intersection.length) {
       item.group.addTo(map);
     } else {
       item.group.removeFrom(map);