diff --git a/src/ol/feature.js b/src/ol/feature.js
index 47551875d5..3742770cd9 100644
--- a/src/ol/feature.js
+++ b/src/ol/feature.js
@@ -98,7 +98,7 @@ ol.Feature = function(opt_geometryOrProperties) {
 
   if (opt_geometryOrProperties !== undefined) {
     if (opt_geometryOrProperties instanceof ol.geom.Geometry ||
-        goog.isNull(opt_geometryOrProperties)) {
+        !opt_geometryOrProperties) {
       var geometry = /** @type {ol.geom.Geometry} */ (opt_geometryOrProperties);
       this.setGeometry(geometry);
     } else {
@@ -127,7 +127,7 @@ ol.Feature.prototype.clone = function() {
     clone.setGeometry(geometry.clone());
   }
   var style = this.getStyle();
-  if (!goog.isNull(style)) {
+  if (style) {
     clone.setStyle(style);
   }
   return clone;
@@ -209,7 +209,7 @@ ol.Feature.prototype.handleGeometryChange_ = function() {
  * @private
  */
 ol.Feature.prototype.handleGeometryChanged_ = function() {
-  if (!goog.isNull(this.geometryChangeKey_)) {
+  if (this.geometryChangeKey_) {
     goog.events.unlistenByKey(this.geometryChangeKey_);
     this.geometryChangeKey_ = null;
   }
@@ -245,7 +245,7 @@ ol.Feature.prototype.setGeometry = function(geometry) {
  */
 ol.Feature.prototype.setStyle = function(style) {
   this.style_ = style;
-  this.styleFunction_ = goog.isNull(style) ?
+  this.styleFunction_ = !style ?
       undefined : ol.Feature.createStyleFunction(style);
   this.changed();
 };