diff --git a/src/ol/interaction/Select.js b/src/ol/interaction/Select.js
index aaaba63537..22f36f2e91 100644
--- a/src/ol/interaction/Select.js
+++ b/src/ol/interaction/Select.js
@@ -255,14 +255,11 @@ class Select extends Interaction {
      */
     this.featureLayerAssociation_ = {};
 
-    if (this.featureOverlay_) {
-      const features = this.featureOverlay_.getSource().getFeaturesCollection();
-      listen(features, CollectionEventType.ADD,
-        this.addFeature_, this);
-      listen(features, CollectionEventType.REMOVE,
-        this.removeFeature_, this);
-    }
-
+    const features = this.featureOverlay_.getSource().getFeaturesCollection();
+    listen(features, CollectionEventType.ADD,
+      this.addFeature_, this);
+    listen(features, CollectionEventType.REMOVE,
+      this.removeFeature_, this);
   }
 
   /**