diff --git a/externs/olx.js b/externs/olx.js
index 9a1cad5491..cba51147c4 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -10,7 +10,7 @@ var olx;
 /**
  * @typedef {{html: string,
  *     tileRanges: (Object.<string, Array.<ol.TileRange>>|undefined)}}
- * @api stable
+ * @api
  */
 olx.AttributionOptions;
 
diff --git a/src/ol/attribution.js b/src/ol/attribution.js
index b8d4aac9d7..eb0dd8a656 100644
--- a/src/ol/attribution.js
+++ b/src/ol/attribution.js
@@ -23,7 +23,7 @@ goog.require('ol.TileRange');
  * @constructor
  * @param {olx.AttributionOptions} options Attribution options.
  * @struct
- * @api
+ * @api stable
  */
 ol.Attribution = function(options) {
 
@@ -45,7 +45,7 @@ ol.Attribution = function(options) {
 
 /**
  * @return {string} HTML.
- * @api
+ * @api stable
  */
 ol.Attribution.prototype.getHTML = function() {
   return this.html_;