diff --git a/src/ol/control/control.js b/src/ol/control/control.js
index 5a31a59715..dba60d9f74 100644
--- a/src/ol/control/control.js
+++ b/src/ol/control/control.js
@@ -12,6 +12,6 @@ ol.Control = function() {
 
 
 /**
- * @param {ol.MapBrowserEvent} event Map browser event.
+ * @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
  */
 ol.Control.prototype.handleMapBrowserEvent = goog.abstractMethod;
diff --git a/src/ol/control/dblclickzoom.js b/src/ol/control/dblclickzoom.js
index 0e23170e57..fd11979d11 100644
--- a/src/ol/control/dblclickzoom.js
+++ b/src/ol/control/dblclickzoom.js
@@ -19,16 +19,17 @@ goog.inherits(ol.control.DblClickZoom, ol.Control);
 /**
  * @inheritDoc
  */
-ol.control.DblClickZoom.prototype.handleMapBrowserEvent = function(event) {
-  if (event.type == goog.events.EventType.DBLCLICK) {
-    var map = event.map;
+ol.control.DblClickZoom.prototype.handleMapBrowserEvent =
+    function(mapBrowserEvent) {
+  if (mapBrowserEvent.type == goog.events.EventType.DBLCLICK) {
+    var map = mapBrowserEvent.map;
     map.whileFrozen(function() {
       // FIXME compute correct center for zoom
-      map.setCenter(event.getCoordinate());
-      var browserEventObject = event.getBrowserEventObject();
+      map.setCenter(mapBrowserEvent.getCoordinate());
+      var browserEventObject = mapBrowserEvent.getBrowserEventObject();
       var scale = browserEventObject.shiftKey ? 2 : 0.5;
       map.setResolution(scale * map.getResolution());
     });
-    event.preventDefault();
+    mapBrowserEvent.preventDefault();
   }
 };
diff --git a/src/ol/control/drag.js b/src/ol/control/drag.js
index 6077b84238..8a8f0ebc01 100644
--- a/src/ol/control/drag.js
+++ b/src/ol/control/drag.js
@@ -59,14 +59,14 @@ goog.inherits(ol.control.Drag, ol.Control);
 
 
 /**
- * @param {ol.MapBrowserEvent} event Event.
+ * @param {ol.MapBrowserEvent} mapBrowserEvent Event.
  * @protected
  */
 ol.control.Drag.prototype.handleDrag = goog.nullFunction;
 
 
 /**
- * @param {ol.MapBrowserEvent} event Event.
+ * @param {ol.MapBrowserEvent} mapBrowserEvent Event.
  * @protected
  * @return {boolean} Capture dragging.
  */
@@ -74,7 +74,7 @@ ol.control.Drag.prototype.handleDragStart = goog.functions.FALSE;
 
 
 /**
- * @param {ol.MapBrowserEvent} event Event.
+ * @param {ol.MapBrowserEvent} mapBrowserEvent Event.
  * @protected
  */
 ol.control.Drag.prototype.handleDragEnd = goog.nullFunction;
@@ -83,35 +83,35 @@ ol.control.Drag.prototype.handleDragEnd = goog.nullFunction;
 /**
  * @inheritDoc
  */
-ol.control.Drag.prototype.handleMapBrowserEvent = function(event) {
+ol.control.Drag.prototype.handleMapBrowserEvent = function(mapBrowserEvent) {
   var browserEventObject;
   if (this.dragging_) {
-    if (event.type == goog.events.EventType.MOUSEMOVE ||
-        event.type == goog.events.EventType.MOUSEOUT ||
-        event.type == goog.events.EventType.MOUSEUP) {
-      browserEventObject = event.getBrowserEventObject();
+    if (mapBrowserEvent.type == goog.events.EventType.MOUSEMOVE ||
+        mapBrowserEvent.type == goog.events.EventType.MOUSEOUT ||
+        mapBrowserEvent.type == goog.events.EventType.MOUSEUP) {
+      browserEventObject = mapBrowserEvent.getBrowserEventObject();
       this.deltaX = browserEventObject.offsetX - this.startX;
       this.deltaY = browserEventObject.offsetY - this.startY;
-      if (event.type == goog.events.EventType.MOUSEMOVE) {
-        this.handleDrag(event);
+      if (mapBrowserEvent.type == goog.events.EventType.MOUSEMOVE) {
+        this.handleDrag(mapBrowserEvent);
       } else {
-        this.handleDragEnd(event);
+        this.handleDragEnd(mapBrowserEvent);
         this.dragging_ = false;
       }
-      event.preventDefault();
+      mapBrowserEvent.preventDefault();
     }
   } else {
-    if (event.type == goog.events.EventType.MOUSEDOWN) {
-      browserEventObject = event.getBrowserEventObject();
+    if (mapBrowserEvent.type == goog.events.EventType.MOUSEDOWN) {
+      browserEventObject = mapBrowserEvent.getBrowserEventObject();
       this.startX = browserEventObject.offsetX;
       this.startY = browserEventObject.offsetY;
       this.deltaX = 0;
       this.deltaY = 0;
-      this.startCenter = event.map.getCenter();
-      this.startCoordinate = event.getCoordinate();
-      if (this.handleDragStart(event)) {
+      this.startCenter = mapBrowserEvent.map.getCenter();
+      this.startCoordinate = mapBrowserEvent.getCoordinate();
+      if (this.handleDragStart(mapBrowserEvent)) {
         this.dragging_ = true;
-        event.preventDefault();
+        mapBrowserEvent.preventDefault();
       }
     }
   }
diff --git a/src/ol/control/dragpan.js b/src/ol/control/dragpan.js
index 7f7302db93..4c8f85e22d 100644
--- a/src/ol/control/dragpan.js
+++ b/src/ol/control/dragpan.js
@@ -20,8 +20,8 @@ goog.inherits(ol.control.DragPan, ol.control.Drag);
 /**
  * @inheritDoc
  */
-ol.control.DragPan.prototype.handleDrag = function(event) {
-  var map = event.map;
+ol.control.DragPan.prototype.handleDrag = function(mapBrowserEvent) {
+  var map = mapBrowserEvent.map;
   var resolution = map.getResolution();
   var center = new goog.math.Coordinate(
       this.startCenter.x - resolution * this.deltaX,
diff --git a/src/ol/control/mousewheelzoom.js b/src/ol/control/mousewheelzoom.js
index 8b94a52b7a..0decb59dab 100644
--- a/src/ol/control/mousewheelzoom.js
+++ b/src/ol/control/mousewheelzoom.js
@@ -19,20 +19,22 @@ goog.inherits(ol.control.MouseWheelZoom, ol.Control);
 /**
  * @inheritDoc
  */
-ol.control.MouseWheelZoom.prototype.handleMapBrowserEvent = function(event) {
-  if (event.type == goog.events.MouseWheelHandler.EventType.MOUSEWHEEL) {
-    var map = event.map;
+ol.control.MouseWheelZoom.prototype.handleMapBrowserEvent =
+    function(mapBrowserEvent) {
+  if (mapBrowserEvent.type ==
+      goog.events.MouseWheelHandler.EventType.MOUSEWHEEL) {
+    var map = mapBrowserEvent.map;
     var mouseWheelEvent = /** @type {goog.events.MouseWheelEvent} */
-        event.getBrowserEventObject();
+        mapBrowserEvent.getBrowserEventObject();
     goog.asserts.assert(mouseWheelEvent instanceof goog.events.MouseWheelEvent);
     if (mouseWheelEvent.deltaY !== 0) {
       map.whileFrozen(function() {
         // FIXME compute correct center for zoom
-        map.setCenter(event.getCoordinate());
+        map.setCenter(mapBrowserEvent.getCoordinate());
         var scale = mouseWheelEvent.deltaY < 0 ? 0.5 : 2;
         map.setResolution(scale * map.getResolution());
       });
-      event.preventDefault();
+      mapBrowserEvent.preventDefault();
       mouseWheelEvent.preventDefault();
     }
   }