diff --git a/src/ol/source/imagestatic.js b/src/ol/source/imagestatic.js
index 5a7a26475a..87dac70ea1 100644
--- a/src/ol/source/imagestatic.js
+++ b/src/ol/source/imagestatic.js
@@ -79,10 +79,8 @@ ol.source.ImageStatic.prototype.handleImageChange = function(evt) {
       imageWidth = this.imageSize_[0];
       imageHeight = this.imageSize_[1];
     } else {
-      // TODO: remove the type cast when a closure-compiler > 20160315 is used.
-      // see: https://github.com/google/closure-compiler/pull/1664
-      imageWidth = /** @type {number} */ (image.width);
-      imageHeight = /** @type {number} */ (image.height);
+      imageWidth = image.width;
+      imageHeight = image.height;
     }
     var resolution = ol.extent.getHeight(imageExtent) / imageHeight;
     var targetWidth = Math.ceil(ol.extent.getWidth(imageExtent) / resolution);