diff --git a/externs/olx.js b/externs/olx.js
index 406ec9b2a7..ab2364f048 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -2534,6 +2534,7 @@ olx.layer.GroupOptions.prototype.hue;
 /**
  * Opacity (0, 1). Default is `1`.
  * @type {number|undefined}
+ * @api stable
  */
 olx.layer.GroupOptions.prototype.opacity;
 
@@ -2541,6 +2542,7 @@ olx.layer.GroupOptions.prototype.opacity;
 /**
  * Saturation. Default is `1`.
  * @type {number|undefined}
+ * @api
  */
 olx.layer.GroupOptions.prototype.saturation;
 
@@ -2548,7 +2550,7 @@ olx.layer.GroupOptions.prototype.saturation;
 /**
  * Visibility. Default is `true`.
  * @type {boolean|undefined}
- * @api
+ * @api stable
  */
 olx.layer.GroupOptions.prototype.visible;
 
@@ -2557,7 +2559,7 @@ olx.layer.GroupOptions.prototype.visible;
  * The bounding extent for layer rendering.  The layer will not be rendered
  * outside of this extent.
  * @type {ol.Extent|undefined}
- * @api
+ * @api stable
  */
 olx.layer.GroupOptions.prototype.extent;
 
@@ -2565,7 +2567,7 @@ olx.layer.GroupOptions.prototype.extent;
 /**
  * The minimum resolution (inclusive) at which this layer will be visible.
  * @type {number|undefined}
- * @api
+ * @api stable
  */
 olx.layer.GroupOptions.prototype.minResolution;
 
@@ -2573,7 +2575,7 @@ olx.layer.GroupOptions.prototype.minResolution;
 /**
  * The maximum resolution (exclusive) below which this layer will be visible.
  * @type {number|undefined}
- * @api
+ * @api stable
  */
 olx.layer.GroupOptions.prototype.maxResolution;
 
@@ -2581,7 +2583,7 @@ olx.layer.GroupOptions.prototype.maxResolution;
 /**
  * Child layers.
  * @type {Array.<ol.layer.Base>|ol.Collection.<ol.layer.Base>|undefined}
- * @api
+ * @api stable
  */
 olx.layer.GroupOptions.prototype.layers;
 
diff --git a/src/ol/layer/layergroup.js b/src/ol/layer/layergroup.js
index b89e46435f..c685a6ec2c 100644
--- a/src/ol/layer/layergroup.js
+++ b/src/ol/layer/layergroup.js
@@ -33,7 +33,7 @@ ol.layer.GroupProperty = {
  * @extends {ol.layer.Base}
  * @fires change Triggered when the group/Collection changes.
  * @param {olx.layer.GroupOptions=} opt_options Layer options.
- * @api
+ * @api stable
  */
 ol.layer.Group = function(opt_options) {
 
@@ -148,7 +148,7 @@ ol.layer.Group.prototype.handleLayersRemove_ = function(collectionEvent) {
  * @return {ol.Collection.<ol.layer.Base>|undefined} Collection of
  * {@link ol.layer.Layer layers} that are part of this group.
  * @observable
- * @api
+ * @api stable
  */
 ol.layer.Group.prototype.getLayers = function() {
   return /** @type {ol.Collection.<ol.layer.Base>|undefined} */ (this.get(
@@ -164,7 +164,7 @@ goog.exportProperty(
  * @param {ol.Collection.<ol.layer.Base>|undefined} layers Collection of
  * {@link ol.layer.Layer layers} that are part of this group.
  * @observable
- * @api
+ * @api stable
  */
 ol.layer.Group.prototype.setLayers = function(layers) {
   this.set(ol.layer.GroupProperty.LAYERS, layers);