diff --git a/src/ol/util.js b/src/ol/util.js
index beecbdc9fa..2eee713b3d 100644
--- a/src/ol/util.js
+++ b/src/ol/util.js
@@ -44,6 +44,7 @@ let uidCounter_ = 0;
  *
  * @param {Object} obj The object to get the unique ID for.
  * @return {number} The unique ID for the object.
+ * @api
  */
 export function getUid(obj) {
   return obj.ol_uid || (obj.ol_uid = ++uidCounter_);