diff --git a/changelog/upgrade-notes.md b/changelog/upgrade-notes.md
index 750115fce4..cf244eef3c 100644
--- a/changelog/upgrade-notes.md
+++ b/changelog/upgrade-notes.md
@@ -11,6 +11,7 @@ A number of internal types have been renamed.  This will not affect those who us
  * rename `ol.style.IconAnchorUnits` to `ol.style.Icon.AnchorUnits`
  * rename `ol.style.IconOrigin` to `ol.style.Icon.Origin`
  * rename `ol.format.IGCZ` to `ol.format.IGC.Z`
+ * rename `ol.layer.GroupProperty` to `ol.layer.Group.Property`
 
 ### v3.18.0
 
diff --git a/src/ol/layer/group.js b/src/ol/layer/group.js
index 260ebc2a8b..cd1f892aa8 100644
--- a/src/ol/layer/group.js
+++ b/src/ol/layer/group.js
@@ -13,14 +13,6 @@ goog.require('ol.obj');
 goog.require('ol.source.State');
 
 
-/**
- * @enum {string}
- */
-ol.layer.GroupProperty = {
-  LAYERS: 'layers'
-};
-
-
 /**
  * @classdesc
  * A {@link ol.Collection} of layers that are handled together.
@@ -56,7 +48,7 @@ ol.layer.Group = function(opt_options) {
   this.listenerKeys_ = {};
 
   ol.events.listen(this,
-      ol.Object.getChangeEventType(ol.layer.GroupProperty.LAYERS),
+      ol.Object.getChangeEventType(ol.layer.Group.Property.LAYERS),
       this.handleLayersChanged_, this);
 
   if (layers) {
@@ -166,7 +158,7 @@ ol.layer.Group.prototype.handleLayersRemove_ = function(collectionEvent) {
  */
 ol.layer.Group.prototype.getLayers = function() {
   return /** @type {!ol.Collection.<ol.layer.Base>} */ (this.get(
-      ol.layer.GroupProperty.LAYERS));
+      ol.layer.Group.Property.LAYERS));
 };
 
 
@@ -179,7 +171,7 @@ ol.layer.Group.prototype.getLayers = function() {
  * @api stable
  */
 ol.layer.Group.prototype.setLayers = function(layers) {
-  this.set(ol.layer.GroupProperty.LAYERS, layers);
+  this.set(ol.layer.Group.Property.LAYERS, layers);
 };
 
 
@@ -237,3 +229,10 @@ ol.layer.Group.prototype.getLayerStatesArray = function(opt_states) {
 ol.layer.Group.prototype.getSourceState = function() {
   return ol.source.State.READY;
 };
+
+/**
+ * @enum {string}
+ */
+ol.layer.Group.Property = {
+  LAYERS: 'layers'
+};