diff --git a/src/ol/source/imagesource.js b/src/ol/source/imagesource.js
index 04c111af63..66fd16e24f 100644
--- a/src/ol/source/imagesource.js
+++ b/src/ol/source/imagesource.js
@@ -78,12 +78,13 @@ goog.inherits(ol.source.Image, ol.source.Source);
  * @protected
  * @param {ol.Extent} extent Extent.
  * @param {number} resolution Resolution.
+ * @param {number} pixelRatio Pixel ratio.
  * @param {ol.Size} size Size.
  * @param {ol.proj.Projection} projection Projection.
  * @return {ol.Image} Single image.
  */
 ol.source.Image.prototype.createImage =
-    function(extent, resolution, size, projection) {
+    function(extent, resolution, pixelRatio, size, projection) {
   var image = null;
   var imageUrl = this.imageUrlFunction(extent, size, projection);
   if (goog.isDef(imageUrl)) {
diff --git a/src/ol/source/imagestaticsource.js b/src/ol/source/imagestaticsource.js
index fd51f361be..38e534035c 100644
--- a/src/ol/source/imagestaticsource.js
+++ b/src/ol/source/imagestaticsource.js
@@ -38,7 +38,7 @@ ol.source.ImageStatic = function(options) {
    * @type {ol.Image}
    */
   this.image_ = this.createImage(
-      imageExtent, imageResolution, imageSize, projection);
+      imageExtent, imageResolution, 1, imageSize, projection);
 
 };
 goog.inherits(ol.source.ImageStatic, ol.source.Image);
diff --git a/src/ol/source/imagewmssource.js b/src/ol/source/imagewmssource.js
index 7f6e25ba99..84431b58fa 100644
--- a/src/ol/source/imagewmssource.js
+++ b/src/ol/source/imagewmssource.js
@@ -85,7 +85,8 @@ ol.source.ImageWMS.prototype.getImage =
   var height = (extent[3] - extent[1]) / resolution;
   var size = [width, height];
 
-  this.image_ = this.createImage(extent, resolution, size, projection);
+  this.image_ = this.createImage(
+      extent, resolution, pixelRatio, size, projection);
   return this.image_;
 };
 
diff --git a/src/ol/source/mapguidesource.js b/src/ol/source/mapguidesource.js
index 52913f93cf..c07cbeb18c 100644
--- a/src/ol/source/mapguidesource.js
+++ b/src/ol/source/mapguidesource.js
@@ -90,7 +90,8 @@ ol.source.MapGuide.prototype.getImage =
   var height = (extent[3] - extent[1]) / resolution;
   var size = [width, height];
 
-  this.image_ = this.createImage(extent, resolution, size, projection);
+  this.image_ = this.createImage(
+      extent, resolution, pixelRatio, size, projection);
   return this.image_;
 };