diff --git a/src/ol/source/source.js b/src/ol/source/source.js
index cd4e1baa2a..776253f1f5 100644
--- a/src/ol/source/source.js
+++ b/src/ol/source/source.js
@@ -40,6 +40,7 @@ ol.source.SourceOptions;
  * @extends {ol.Observable}
  * @fires change Triggered when the state of the source changes.
  * @param {ol.source.SourceOptions} options Source options.
+ * @api stable
  */
 ol.source.Source = function(options) {