diff --git a/src/ol/layer/imagelayer.js b/src/ol/layer/imagelayer.js
index 36f96b4c13..6e41c8b733 100644
--- a/src/ol/layer/imagelayer.js
+++ b/src/ol/layer/imagelayer.js
@@ -19,7 +19,7 @@ goog.require('ol.layer.Layer');
  * @api stable
  */
 ol.layer.Image = function(opt_options) {
-  var options = goog.isDef(opt_options) ? opt_options : {};
+  var options = opt_options ? opt_options : {};
   goog.base(this,  /** @type {olx.layer.LayerOptions} */ (options));
 };
 goog.inherits(ol.layer.Image, ol.layer.Layer);