diff --git a/src/ol/style/circle.js b/src/ol/style/circle.js
index 885acfb4ac..c04cef2053 100644
--- a/src/ol/style/circle.js
+++ b/src/ol/style/circle.js
@@ -23,6 +23,12 @@ ol.style.Circle = function(opt_options) {
 
   var options = opt_options || {};
 
+  /**
+   * @private
+   * @type {ol.style.AtlasManager|undefined}
+   */
+  this.atlasManager_ = options.atlasManager;
+
   /**
    * @private
    * @type {Array.<string>}
@@ -89,12 +95,6 @@ ol.style.Circle = function(opt_options) {
    */
   this.hitDetectionImageSize_ = null;
 
-  /**
-   * @private
-   * @type {ol.style.AtlasManager|undefined}
-   */
-  this.atlasManager_ = options.atlasManager;
-
   this.render_(this.atlasManager_);
 
   /**
@@ -231,6 +231,18 @@ ol.style.Circle.prototype.getStroke = function() {
 };
 
 
+/**
+ * Set the circle radius.
+ *
+ * @param {number} radius Circle radius.
+ * @api
+ */
+ol.style.Circle.prototype.setRadius = function(radius) {
+  this.radius_ = radius;
+  this.render_(this.atlasManager_);
+};
+
+
 /**
  * @inheritDoc
  */
diff --git a/test/spec/ol/style/circle.test.js b/test/spec/ol/style/circle.test.js
index 83ebbedbef..f8991a84d2 100644
--- a/test/spec/ol/style/circle.test.js
+++ b/test/spec/ol/style/circle.test.js
@@ -285,4 +285,19 @@ describe('ol.style.Circle', function() {
     });
 
   });
+
+  describe('#setRadius', function() {
+    it('changes the circle radius', function() {
+      var style = new ol.style.Circle({
+        radius: 10,
+        fill: new ol.style.Fill({
+          color: '#FFFF00'
+        })
+      });
+      expect(style.getRadius()).to.eql(10);
+      style.setRadius(20);
+      expect(style.getRadius()).to.eql(20);
+    });
+  });
+
 });