diff --git a/src/ol/control/zoomslidercontrol.js b/src/ol/control/zoomslidercontrol.js
index 605131b875..e4a968c3c4 100644
--- a/src/ol/control/zoomslidercontrol.js
+++ b/src/ol/control/zoomslidercontrol.js
@@ -4,7 +4,6 @@ goog.provide('ol.control.ZoomSlider');
 
 goog.require('goog.asserts');
 goog.require('goog.dom');
-goog.require('goog.math.Rect');
 goog.require('goog.style');
 goog.require('ol.events');
 goog.require('ol.events.Event');
@@ -55,25 +54,37 @@ ol.control.ZoomSlider = function(opt_options) {
 
   /**
    * @type {boolean}
+   * @private
    */
   this.dragging_;
+
   /**
    * @type {Array.<ol.events.Key>}
+   * @private
    */
   this.dragListenerKeys_;
 
   /**
-   * @type {goog.math.Rect}
+   * @type {number}
+   * @private
    */
-  this.limits_;
+  this.heightLimit_ = 0;
+
+  /**
+   * @type {number}
+   * @private
+   */
+  this.widthLimit_ = 0;
 
   /**
    * @type {number|undefined}
+   * @private
    */
   this.previousX_;
 
   /**
    * @type {number|undefined}
+   * @private
    */
   this.previousY_;
 
@@ -93,8 +104,8 @@ ol.control.ZoomSlider = function(opt_options) {
   this.sliderInitialized_ = false;
 
   /**
-   * @private
    * @type {number}
+   * @private
    */
   this.duration_ = options.duration !== undefined ? options.duration : 200;
 
@@ -174,18 +185,13 @@ ol.control.ZoomSlider.prototype.initSlider_ = function() {
       thumbMargins.top + thumbMargins.bottom;
   this.thumbSize_ = [thumbWidth, thumbHeight];
 
-  var width = containerSize.width - thumbWidth;
-  var height = containerSize.height - thumbHeight;
-
-  var limits;
   if (containerSize.width > containerSize.height) {
     this.direction_ = ol.control.ZoomSlider.direction.HORIZONTAL;
-    limits = new goog.math.Rect(0, 0, width, 0);
+    this.widthLimit_ = containerSize.width - thumbWidth;
   } else {
     this.direction_ = ol.control.ZoomSlider.direction.VERTICAL;
-    limits = new goog.math.Rect(0, 0, 0, height);
+    this.heightLimit_ = containerSize.height - thumbHeight;
   }
-  this.limits_ = limits;
   this.sliderInitialized_ = true;
 };
 
@@ -325,10 +331,9 @@ ol.control.ZoomSlider.prototype.setThumbPosition_ = function(res) {
   var thumb = goog.dom.getFirstElementChild(this.element);
 
   if (this.direction_ == ol.control.ZoomSlider.direction.HORIZONTAL) {
-    thumb.style.left = this.limits_.left + this.limits_.width * position + 'px';
+    thumb.style.left = this.widthLimit_ * position + 'px';
   } else {
-    thumb.style.left = this.limits_.left + 'px';
-    thumb.style.top = this.limits_.top + this.limits_.height * position + 'px';
+    thumb.style.top = this.heightLimit_ * position + 'px';
   }
 };
 
@@ -344,12 +349,11 @@ ol.control.ZoomSlider.prototype.setThumbPosition_ = function(res) {
  * @private
  */
 ol.control.ZoomSlider.prototype.getRelativePosition_ = function(x, y) {
-  var draggerLimits = this.limits_;
   var amount;
   if (this.direction_ === ol.control.ZoomSlider.direction.HORIZONTAL) {
-    amount = (x - draggerLimits.left) / draggerLimits.width;
+    amount = x / this.widthLimit_;
   } else {
-    amount = (y - draggerLimits.top) / draggerLimits.height;
+    amount = y / this.heightLimit_;
   }
   return ol.math.clamp(amount, 0, 1);
 };
diff --git a/test/spec/ol/control/zoomslidercontrol.test.js b/test/spec/ol/control/zoomslidercontrol.test.js
index fc71799507..9fe30399c3 100644
--- a/test/spec/ol/control/zoomslidercontrol.test.js
+++ b/test/spec/ol/control/zoomslidercontrol.test.js
@@ -52,7 +52,8 @@ describe('ol.control.ZoomSlider', function() {
   describe('#initSlider_', function() {
     it('sets limits', function() {
       zoomslider.initSlider_();
-      expect(zoomslider.limits_ instanceof goog.math.Rect).to.be(true);
+      expect(zoomslider.widthLimit_).not.to.be(0);
+      expect(zoomslider.heightLimit_).to.be(0);
     });
   });
 
@@ -115,19 +116,19 @@ describe('ol.control.ZoomSlider', function() {
       var event = new ol.pointer.PointerEvent(ol.pointer.EventType.POINTERDOWN, {
         target: control.element.firstElementChild
       });
-      event.clientX = control.limits_.width;
+      event.clientX = control.widthLimit_;
       event.clientY = 0;
       dragger.dispatchEvent(event);
       expect(control.currentResolution_).to.be(16);
       expect(control.dragging_).to.be(true);
       expect(control.dragListenerKeys_).to.be.ok();
       event.type = ol.pointer.EventType.POINTERMOVE;
-      event.clientX = 6 * control.limits_.width / 8;
+      event.clientX = 6 * control.widthLimit_ / 8;
       event.clientY = 0;
       dragger.dispatchEvent(event);
       expect(control.currentResolution_).to.be(4);
       event.type = ol.pointer.EventType.POINTERMOVE;
-      event.clientX = 4 * control.limits_.width / 8;
+      event.clientX = 4 * control.widthLimit_ / 8;
       event.clientY = 0;
       dragger.dispatchEvent(event);
       event.type = ol.pointer.EventType.POINTERUP;
@@ -159,12 +160,12 @@ describe('ol.control.ZoomSlider', function() {
       expect(control.dragListenerKeys_).to.be.ok();
       event.type = ol.pointer.EventType.POINTERMOVE;
       event.clientX = 0;
-      event.clientY = 2 * control.limits_.height / 8;
+      event.clientY = 2 * control.heightLimit_ / 8;
       dragger.dispatchEvent(event);
       expect(control.currentResolution_).to.be(0.25);
       event.type = ol.pointer.EventType.POINTERMOVE;
       event.clientX = 0;
-      event.clientY = 4 * control.limits_.height / 8;
+      event.clientY = 4 * control.heightLimit_ / 8;
       dragger.dispatchEvent(event);
       event.type = ol.pointer.EventType.POINTERUP;
       dragger.dispatchEvent(event);
@@ -179,7 +180,6 @@ describe('ol.control.ZoomSlider', function() {
 goog.require('goog.Disposable');
 goog.require('goog.dispose');
 goog.require('goog.dom.classlist');
-goog.require('goog.math.Rect');
 goog.require('ol.Map');
 goog.require('ol.View');
 goog.require('ol.control.ZoomSlider');