diff --git a/src/ol/source/Vector.js b/src/ol/source/Vector.js
index 21812eb916f..ea757dd4cc1 100644
--- a/src/ol/source/Vector.js
+++ b/src/ol/source/Vector.js
@@ -68,9 +68,10 @@ export class VectorSourceEvent extends Event {
 
 /***
  * @template Return
+ * @template {import("../Feature.js").FeatureLike} [FeatureType=import("../Feature.js").default]
  * @typedef {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default, Return> &
  *   import("../Observable").OnSignature<import("../ObjectEventType").Types, import("../Object").ObjectEvent, Return> &
- *   import("../Observable").OnSignature<import("./VectorEventType").VectorSourceEventTypes, VectorSourceEvent, Return> &
+ *   import("../Observable").OnSignature<import("./VectorEventType").VectorSourceEventTypes, VectorSourceEvent<FeatureType>, Return> &
  *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
  *     import("./VectorEventType").VectorSourceEventTypes, Return>} VectorSourceOnSignature
  */
@@ -194,12 +195,12 @@ class VectorSource extends Source {
     });
 
     /***
-     * @type {VectorSourceOnSignature<import("../events").EventsKey>}
+     * @type {VectorSourceOnSignature<import("../events").EventsKey, FeatureType>}
      */
     this.on;
 
     /***
-     * @type {VectorSourceOnSignature<import("../events").EventsKey>}
+     * @type {VectorSourceOnSignature<import("../events").EventsKey, FeatureType>}
      */
     this.once;