diff --git a/externs/olx.js b/externs/olx.js
index 243d5ad32f..2ca101adcd 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -4278,7 +4278,7 @@ olx.source.ImageWMSOptions.prototype.url;
  *     opaque: (boolean|undefined),
  *     tileLoadFunction: (ol.TileLoadFunctionType|undefined),
  *     url: (string|undefined)}}
- * @api
+ * @api stable
  */
 olx.source.StamenOptions;
 
diff --git a/src/ol/source/stamensource.js b/src/ol/source/stamensource.js
index 271b3ffbfa..7e7c15e5c8 100644
--- a/src/ol/source/stamensource.js
+++ b/src/ol/source/stamensource.js
@@ -85,7 +85,7 @@ ol.source.StamenProviderConfig = {
  * @constructor
  * @extends {ol.source.XYZ}
  * @param {olx.source.StamenOptions} options Stamen options.
- * @api
+ * @api stable
  */
 ol.source.Stamen = function(options) {