diff --git a/CHANGES.md b/CHANGES.md
index eda12f8a2..b9453e0ad 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,7 @@
 * Changes
   * Enable googshift eslint rules to prepare for ES6 modules migration; move
     source to the olcs directory and fix filenames.
+  * Add basic support for clustered sources: see https://github.com/openlayers/ol-cesium/pull/496.
 
 
 # v 1.31 - 2017-09-06
diff --git a/src/olcs/featureconverter.js b/src/olcs/featureconverter.js
index 8f03179c2..8a6a661e1 100644
--- a/src/olcs/featureconverter.js
+++ b/src/olcs/featureconverter.js
@@ -4,6 +4,7 @@ goog.require('ol.geom.Geometry');
 goog.require('ol.source.ImageVector');
 goog.require('ol.style.Icon');
 goog.require('ol.source.Vector');
+goog.require('ol.source.Cluster');
 
 goog.require('goog.asserts');
 goog.require('ol');
@@ -993,6 +994,9 @@ olcs.FeatureConverter.prototype.olVectorLayerToCesium = function(olLayer, olView
       return new olcs.core.VectorLayerCounterpart(proj, this.scene);
     }
   }
+  if (source instanceof ol.source.Cluster) {
+    source = source.getSource();
+  }
 
   goog.asserts.assertInstanceof(source, ol.source.Vector);
   const features = source.getFeatures();
diff --git a/src/olcs/vectorsynchronizer.js b/src/olcs/vectorsynchronizer.js
index 47488c733..3ce3543ad 100644
--- a/src/olcs/vectorsynchronizer.js
+++ b/src/olcs/vectorsynchronizer.js
@@ -2,6 +2,7 @@ goog.provide('olcs.VectorSynchronizer');
 goog.require('ol.source.Vector');
 goog.require('ol.layer.Layer');
 goog.require('ol.source.ImageVector');
+goog.require('ol.source.Cluster');
 goog.require('ol.layer.Image');
 
 goog.require('goog.asserts');
@@ -98,6 +99,9 @@ olcs.VectorSynchronizer.prototype.createSingleLayerCounterparts = function(olLay
   if (source instanceof ol.source.ImageVector) {
     source = source.getSource();
   }
+  if (source instanceof ol.source.Cluster) {
+    source = source.getSource();
+  }
 
   goog.asserts.assertInstanceof(source, ol.source.Vector);
   goog.asserts.assert(this.view);