diff --git a/src/ol/extent.js b/src/ol/extent.js
index 1cf9d361a7..1011e84acc 100644
--- a/src/ol/extent.js
+++ b/src/ol/extent.js
@@ -46,9 +46,7 @@ ol.Extent.boundingExtent = function(var_args) {
  * @return {ol.Extent} Empty extent.
  */
 ol.Extent.createEmptyExtent = function() {
-  return new ol.Extent(
-      Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY,
-      Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY);
+  return new ol.Extent(Infinity, Infinity, -Infinity, -Infinity);
 };
 
 
diff --git a/src/ol/math.js b/src/ol/math.js
index b07da1f04a..8a1d41a965 100644
--- a/src/ol/math.js
+++ b/src/ol/math.js
@@ -35,7 +35,7 @@ ol.math.csch = function(x) {
  */
 ol.math.roundUpToPowerOfTwo = function(x) {
   goog.asserts.assert(0 < x);
-  return Math.pow(2, Math.ceil(Math.log(x) / Math.log(2)));
+  return Math.pow(2, Math.ceil(Math.log(x) / Math.LN2));
 };