diff --git a/src/ol/interaction/draginteraction.js b/src/ol/interaction/draginteraction.js
index b8b019fb72..952b4ef1ef 100644
--- a/src/ol/interaction/draginteraction.js
+++ b/src/ol/interaction/draginteraction.js
@@ -111,7 +111,7 @@ ol.interaction.Drag.prototype.handleMapBrowserEvent =
     this.deltaY = 0;
     this.startCenter = /** @type {!ol.Coordinate} */ map.getCenter();
     this.startCoordinate = /** @type {ol.Coordinate} */
-        mapBrowserEvent.getCoordinate();
+        (mapBrowserEvent.getCoordinate());
     var handled = this.handleDragStart(mapBrowserEvent);
     if (handled) {
       this.dragging_ = true;
diff --git a/src/ol/interaction/keyboardinteraction.js b/src/ol/interaction/keyboardinteraction.js
index 4a104b48a0..8057b858ff 100644
--- a/src/ol/interaction/keyboardinteraction.js
+++ b/src/ol/interaction/keyboardinteraction.js
@@ -43,7 +43,7 @@ ol.interaction.Keyboard.prototype.handleMapBrowserEvent =
     function(mapBrowserEvent) {
   if (mapBrowserEvent.type == goog.events.KeyHandler.EventType.KEY) {
     var keyEvent = /** @type {goog.events.KeyEvent} */
-        mapBrowserEvent.browserEvent;
+        (mapBrowserEvent.browserEvent);
     var callback = this.charCodeCallbacks_[keyEvent.charCode];
     if (callback) {
       callback();
diff --git a/src/ol/interaction/keyboardpaninteraction.js b/src/ol/interaction/keyboardpaninteraction.js
index 044b376f40..c663ddbcd8 100644
--- a/src/ol/interaction/keyboardpaninteraction.js
+++ b/src/ol/interaction/keyboardpaninteraction.js
@@ -32,7 +32,7 @@ ol.interaction.KeyboardPan.prototype.handleMapBrowserEvent =
     function(mapBrowserEvent) {
   if (mapBrowserEvent.type == goog.events.KeyHandler.EventType.KEY) {
     var keyEvent = /** @type {goog.events.KeyEvent} */
-        mapBrowserEvent.browserEvent;
+        (mapBrowserEvent.browserEvent);
     var keyCode = keyEvent.keyCode;
     if (keyCode == goog.events.KeyCodes.DOWN ||
         keyCode == goog.events.KeyCodes.LEFT ||
diff --git a/src/ol/interaction/keyboardzoominteraction.js b/src/ol/interaction/keyboardzoominteraction.js
index d02249755b..c086435979 100644
--- a/src/ol/interaction/keyboardzoominteraction.js
+++ b/src/ol/interaction/keyboardzoominteraction.js
@@ -23,7 +23,7 @@ ol.interaction.KeyboardZoom.prototype.handleMapBrowserEvent =
     function(mapBrowserEvent) {
   if (mapBrowserEvent.type == goog.events.KeyHandler.EventType.KEY) {
     var keyEvent = /** @type {goog.events.KeyEvent} */
-        mapBrowserEvent.browserEvent;
+        (mapBrowserEvent.browserEvent);
     var charCode = keyEvent.charCode;
     if (charCode == '+'.charCodeAt(0) || charCode == '-'.charCodeAt(0)) {
       var map = mapBrowserEvent.map;
diff --git a/src/ol/interaction/mousewheelzoominteraction.js b/src/ol/interaction/mousewheelzoominteraction.js
index 0e439742c3..563c4dbd8a 100644
--- a/src/ol/interaction/mousewheelzoominteraction.js
+++ b/src/ol/interaction/mousewheelzoominteraction.js
@@ -32,7 +32,7 @@ ol.interaction.MouseWheelZoom.prototype.handleMapBrowserEvent =
       goog.events.MouseWheelHandler.EventType.MOUSEWHEEL) {
     var map = mapBrowserEvent.map;
     var mouseWheelEvent = /** @type {goog.events.MouseWheelEvent} */
-        mapBrowserEvent.browserEvent;
+        (mapBrowserEvent.browserEvent);
     goog.asserts.assert(mouseWheelEvent instanceof goog.events.MouseWheelEvent);
     var anchor = mapBrowserEvent.getCoordinate();
     var delta = mouseWheelEvent.deltaY < 0 ? this.delta_ : -this.delta_;