diff --git a/src/ol/control/zoomslider.js b/src/ol/control/zoomslider.js
index b29ed71cba..90746513e4 100644
--- a/src/ol/control/zoomslider.js
+++ b/src/ol/control/zoomslider.js
@@ -55,12 +55,6 @@ ol.control.ZoomSlider = function(opt_options) {
    */
   this.dragging_;
 
-  /**
-   * @type {!Array.<ol.EventsKey>}
-   * @private
-   */
-  this.dragListenerKeys_ = [];
-
   /**
    * @type {number}
    * @private
@@ -255,25 +249,11 @@ ol.control.ZoomSlider.prototype.handleContainerClick_ = function(event) {
  * @private
  */
 ol.control.ZoomSlider.prototype.handleDraggerStart_ = function(event) {
-  if (!this.dragging_ &&
-      event.originalEvent.target === this.element.firstElementChild) {
+  if (!this.dragging_ && event.originalEvent.target === this.element.firstElementChild) {
     this.getMap().getView().setHint(ol.ViewHint.INTERACTING, 1);
     this.previousX_ = event.clientX;
     this.previousY_ = event.clientY;
     this.dragging_ = true;
-
-    if (this.dragListenerKeys_.length === 0) {
-      var drag = this.handleDraggerDrag_;
-      var end = this.handleDraggerEnd_;
-      this.dragListenerKeys_.push(
-        ol.events.listen(document, ol.events.EventType.MOUSEMOVE, drag, this),
-        ol.events.listen(document, ol.events.EventType.TOUCHMOVE, drag, this),
-        ol.events.listen(document, ol.pointer.EventType.POINTERMOVE, drag, this),
-        ol.events.listen(document, ol.events.EventType.MOUSEUP, end, this),
-        ol.events.listen(document, ol.events.EventType.TOUCHEND, end, this),
-        ol.events.listen(document, ol.pointer.EventType.POINTERUP, end, this)
-      );
-    }
   }
 };
 
@@ -318,8 +298,6 @@ ol.control.ZoomSlider.prototype.handleDraggerEnd_ = function(event) {
     this.dragging_ = false;
     this.previousX_ = undefined;
     this.previousY_ = undefined;
-    this.dragListenerKeys_.forEach(ol.events.unlistenByKey);
-    this.dragListenerKeys_.length = 0;
   }
 };
 
diff --git a/test/spec/ol/control/zoomslider.test.js b/test/spec/ol/control/zoomslider.test.js
index 613f1ec976..de6e090f06 100644
--- a/test/spec/ol/control/zoomslider.test.js
+++ b/test/spec/ol/control/zoomslider.test.js
@@ -122,7 +122,6 @@ describe('ol.control.ZoomSlider', function() {
       dragger.dispatchEvent(event);
       expect(control.currentResolution_).to.be(16);
       expect(control.dragging_).to.be(true);
-      expect(control.dragListenerKeys_.length).to.be(6);
       event.type = 'pointermove';
       event.clientX = 6 * control.widthLimit_ / 8;
       event.clientY = 0;
@@ -135,7 +134,6 @@ describe('ol.control.ZoomSlider', function() {
       event.type = 'pointerup';
       dragger.dispatchEvent(event);
       expect(control.currentResolution_).to.be(1);
-      expect(control.dragListenerKeys_.length).to.be(0);
       expect(control.dragging_).to.be(false);
     });
     it('[vertical] handles a drag sequence', function() {
@@ -156,7 +154,6 @@ describe('ol.control.ZoomSlider', function() {
       dragger.dispatchEvent(event);
       expect(control.currentResolution_).to.be(0.0625);
       expect(control.dragging_).to.be(true);
-      expect(control.dragListenerKeys_.length).to.be(6);
       event.type = 'pointermove';
       event.clientX = 0;
       event.clientY = 2 * control.heightLimit_ / 8;
@@ -169,7 +166,6 @@ describe('ol.control.ZoomSlider', function() {
       event.type = 'pointerup';
       dragger.dispatchEvent(event);
       expect(control.currentResolution_).to.be(1);
-      expect(control.dragListenerKeys_.length).to.be(0);
       expect(control.dragging_).to.be(false);
     });
   });