diff --git a/src/ol/object.js b/src/ol/object.js
index 1dba992cd7..4d82943de0 100644
--- a/src/ol/object.js
+++ b/src/ol/object.js
@@ -63,6 +63,8 @@ ol.ObjectAccessor = function(target, key) {
 ol.ObjectAccessor.prototype.transform = function(from, to) {
   this.from = from;
   this.to = to;
+
+  this.target.notify(this.key);
 };