diff --git a/modules/ui/feature_list.js b/modules/ui/feature_list.js
index a0525801b..6a1dd7932 100644
--- a/modules/ui/feature_list.js
+++ b/modules/ui/feature_list.js
@@ -334,11 +334,15 @@ export function uiFeatureList(context) {
 
 
         function mouseover(d3_event, d) {
+            if (d.id === -1) return;
+
             utilHighlightEntities([d.id], true, context);
         }
 
 
         function mouseout(d3_event, d) {
+            if (d.id === -1) return;
+
             utilHighlightEntities([d.id], false, context);
         }