diff --git a/exports/ol/map.js b/exports/ol/map.js
index 0519af9113..1b038c0d6c 100644
--- a/exports/ol/map.js
+++ b/exports/ol/map.js
@@ -7,10 +7,8 @@ goog.require('ol.Map');
  * @extends {ol.Map}
  * @param {Element} container Container.
  * @param {olx.MapOptionsExtern} mapOptionsExtern Map options literal.
- * @param {goog.dom.ViewportSizeMonitor=} opt_viewportSizeMonitor
- *     Viewport size monitor.
  */
-ol.MapExport = function(container, mapOptionsExtern, opt_viewportSizeMonitor) {
+ol.MapExport = function(container, mapOptionsExtern) {
 
   goog.base(this, container, {
     center: mapOptionsExtern.center,
@@ -29,7 +27,7 @@ ol.MapExport = function(container, mapOptionsExtern, opt_viewportSizeMonitor) {
     shiftDragZoom: mapOptionsExtern.shiftDragZoom,
     userProjection: mapOptionsExtern.userProjection,
     zoom: mapOptionsExtern.zoom
-  }, opt_viewportSizeMonitor);
+  });
 
 };
 goog.inherits(ol.MapExport, ol.Map);
diff --git a/src/ol/map.js b/src/ol/map.js
index e6af6989fe..0f5641eae3 100644
--- a/src/ol/map.js
+++ b/src/ol/map.js
@@ -77,10 +77,8 @@ ol.MapPaneZIndex = {
  * @implements {goog.fx.anim.Animated}
  * @param {Element} container Container.
  * @param {ol.MapOptionsLiteral} mapOptionsLiteral Map options literal.
- * @param {goog.dom.ViewportSizeMonitor=} opt_viewportSizeMonitor
- *     Viewport size monitor.
  */
-ol.Map = function(container, mapOptionsLiteral, opt_viewportSizeMonitor) {
+ol.Map = function(container, mapOptionsLiteral) {
 
   goog.base(this);
 
@@ -180,10 +178,8 @@ ol.Map = function(container, mapOptionsLiteral, opt_viewportSizeMonitor) {
 
   /**
    * @private
-   * @type {goog.dom.ViewportSizeMonitor}
    */
-  this.viewportSizeMonitor_ =
-      opt_viewportSizeMonitor || new goog.dom.ViewportSizeMonitor();
+  this.viewportSizeMonitor_ = new goog.dom.ViewportSizeMonitor();
 
   goog.events.listen(this.viewportSizeMonitor_, goog.events.EventType.RESIZE,
       this.handleBrowserWindowResize, false, this);