diff --git a/src/ol/interaction/DragAndDrop.js b/src/ol/interaction/DragAndDrop.js
index b41287e2be..d5caa1aa39 100644
--- a/src/ol/interaction/DragAndDrop.js
+++ b/src/ol/interaction/DragAndDrop.js
@@ -149,13 +149,13 @@ class DragAndDrop extends Interaction {
       if (features && features.length > 0) {
         if (this.source_) {
           this.source_.clear();
-          this.source_.addFeatures(features);
+          this.source_.addFeatures(/** @type {Array<import("../Feature.js").default>} */ (features));
         }
         this.dispatchEvent(
           new DragAndDropEvent(
             DragAndDropEventType.ADD_FEATURES,
             file,
-            features,
+            /** @type {Array<import("../Feature.js").default>} */ (features),
             projection
           )
         );