diff --git a/src/ol/renderer/dom/dommaprenderer.js b/src/ol/renderer/dom/dommaprenderer.js
index 11ed8a7bb2..1f97da7605 100644
--- a/src/ol/renderer/dom/dommaprenderer.js
+++ b/src/ol/renderer/dom/dommaprenderer.js
@@ -79,8 +79,8 @@ ol.renderer.dom.Map.prototype.renderFrame = function(frameState) {
 
   var layerStates = frameState.layerStates;
   var layersArray = frameState.layersArray;
-  var i, layer, layerRenderer, layerState;
-  for (i = 0; i < layersArray.length; ++i) {
+  var i, ii, layer, layerRenderer, layerState;
+  for (i = 0, ii = layersArray.length; i < ii; ++i) {
     layer = layersArray[i];
     layerRenderer = this.getLayerRenderer(layer);
     layerState = frameState.layerStates[goog.getUid(layer)];
diff --git a/src/ol/renderer/dom/domtilelayerrenderer.js b/src/ol/renderer/dom/domtilelayerrenderer.js
index f80bbe6754..753199a434 100644
--- a/src/ol/renderer/dom/domtilelayerrenderer.js
+++ b/src/ol/renderer/dom/domtilelayerrenderer.js
@@ -155,8 +155,9 @@ ol.renderer.dom.TileLayer.prototype.renderFrame =
   /** @type {Object.<number, boolean>} */
   var newTileLayerZKeys = {};
 
-  var iz, tileCoordKey, tileCoordOrigin, tileLayerZ, tileLayerZKey, tilesToDraw;
-  for (iz = 0; iz < zs.length; ++iz) {
+  var iz, iziz;
+  var tileCoordKey, tileCoordOrigin, tileLayerZ, tileLayerZKey, tilesToDraw;
+  for (iz = 0, iziz = zs.length; iz < iziz; ++iz) {
     tileLayerZKey = zs[iz];
     if (tileLayerZKey in this.tileLayerZs_) {
       tileLayerZ = this.tileLayerZs_[tileLayerZKey];
@@ -179,9 +180,9 @@ ol.renderer.dom.TileLayer.prototype.renderFrame =
       goog.array.map(goog.object.getKeys(this.tileLayerZs_), Number);
   goog.array.sort(tileLayerZKeys);
 
-  var i, j, origin, resolution;
+  var i, ii, j, origin, resolution;
   var transform = goog.vec.Mat4.createNumber();
-  for (i = 0; i < tileLayerZKeys.length; ++i) {
+  for (i = 0, ii = tileLayerZKeys.length; i < ii; ++i) {
     tileLayerZKey = tileLayerZKeys[i];
     tileLayerZ = this.tileLayerZs_[tileLayerZKey];
     if (!(tileLayerZKey in tilesToDrawByZ)) {
@@ -371,8 +372,8 @@ ol.renderer.dom.TileLayerZ_.prototype.removeTilesOutsideExtent =
       tilesToRemove.push(tile);
     }
   }
-  var i;
-  for (i = 0; i < tilesToRemove.length; ++i) {
+  var i, ii;
+  for (i = 0, ii = tilesToRemove.length; i < ii; ++i) {
     tile = tilesToRemove[i];
     tileCoordKey = tile.tileCoord.toString();
     goog.dom.removeNode(tile.getImage(this));