diff --git a/src/ol/style.js b/src/ol/style.js
index 744ffc2474..b9bc21cd64 100644
--- a/src/ol/style.js
+++ b/src/ol/style.js
@@ -1,12 +1,12 @@
 /**
  * @module ol/style
  */
-import _ol_style_IconImageCache_ from './style/IconImageCache.js';
+import IconImageCache from './style/IconImageCache.js';
 var _ol_style_ = {};
 
 /**
  * The {@link ol.style.IconImageCache} for {@link ol.style.Icon} images.
  * @api
  */
-_ol_style_.iconImageCache = new _ol_style_IconImageCache_();
+_ol_style_.iconImageCache = new IconImageCache();
 export default _ol_style_;
diff --git a/src/ol/style/IconImageCache.js b/src/ol/style/IconImageCache.js
index 14935640f4..c7c773664a 100644
--- a/src/ol/style/IconImageCache.js
+++ b/src/ol/style/IconImageCache.js
@@ -7,7 +7,7 @@ import _ol_color_ from '../color.js';
  * Singleton class. Available through {@link ol.style.iconImageCache}.
  * @constructor
  */
-var _ol_style_IconImageCache_ = function() {
+var IconImageCache = function() {
 
   /**
    * @type {Object.<string, ol.style.IconImage>}
@@ -35,16 +35,16 @@ var _ol_style_IconImageCache_ = function() {
  * @param {ol.Color} color Color.
  * @return {string} Cache key.
  */
-_ol_style_IconImageCache_.getKey = function(src, crossOrigin, color) {
+function getKey(src, crossOrigin, color) {
   var colorString = color ? _ol_color_.asString(color) : 'null';
   return crossOrigin + ':' + src + ':' + colorString;
-};
+}
 
 
 /**
  * FIXME empty description for jsdoc
  */
-_ol_style_IconImageCache_.prototype.clear = function() {
+IconImageCache.prototype.clear = function() {
   this.cache_ = {};
   this.cacheSize_ = 0;
 };
@@ -53,7 +53,7 @@ _ol_style_IconImageCache_.prototype.clear = function() {
 /**
  * FIXME empty description for jsdoc
  */
-_ol_style_IconImageCache_.prototype.expire = function() {
+IconImageCache.prototype.expire = function() {
   if (this.cacheSize_ > this.maxCacheSize_) {
     var i = 0;
     var key, iconImage;
@@ -74,8 +74,8 @@ _ol_style_IconImageCache_.prototype.expire = function() {
  * @param {ol.Color} color Color.
  * @return {ol.style.IconImage} Icon image.
  */
-_ol_style_IconImageCache_.prototype.get = function(src, crossOrigin, color) {
-  var key = _ol_style_IconImageCache_.getKey(src, crossOrigin, color);
+IconImageCache.prototype.get = function(src, crossOrigin, color) {
+  var key = getKey(src, crossOrigin, color);
   return key in this.cache_ ? this.cache_[key] : null;
 };
 
@@ -86,8 +86,8 @@ _ol_style_IconImageCache_.prototype.get = function(src, crossOrigin, color) {
  * @param {ol.Color} color Color.
  * @param {ol.style.IconImage} iconImage Icon image.
  */
-_ol_style_IconImageCache_.prototype.set = function(src, crossOrigin, color, iconImage) {
-  var key = _ol_style_IconImageCache_.getKey(src, crossOrigin, color);
+IconImageCache.prototype.set = function(src, crossOrigin, color, iconImage) {
+  var key = getKey(src, crossOrigin, color);
   this.cache_[key] = iconImage;
   ++this.cacheSize_;
 };
@@ -100,8 +100,8 @@ _ol_style_IconImageCache_.prototype.set = function(src, crossOrigin, color, icon
  * @param {number} maxCacheSize Cache max size.
  * @api
  */
-_ol_style_IconImageCache_.prototype.setSize = function(maxCacheSize) {
+IconImageCache.prototype.setSize = function(maxCacheSize) {
   this.maxCacheSize_ = maxCacheSize;
   this.expire();
 };
-export default _ol_style_IconImageCache_;
+export default IconImageCache;