diff --git a/src/ol/source/tileimagesource.js b/src/ol/source/tileimagesource.js
index c4bacb7966..13f73ff660 100644
--- a/src/ol/source/tileimagesource.js
+++ b/src/ol/source/tileimagesource.js
@@ -119,17 +119,38 @@ ol.source.TileImage.prototype.getTile =
 };
 
 
+/**
+ * @return {ol.TileLoadFunctionType} TileLoadFunction
+ * @todo api
+ */
+ol.source.TileImage.prototype.getTileLoadFunction = function() {
+  return this.tileLoadFunction;
+};
+
+
 /**
  * @return {ol.TileUrlFunctionType} TileUrlFunction
- * @todo stability experimental
+ * @todo api
  */
 ol.source.TileImage.prototype.getTileUrlFunction = function() {
   return this.tileUrlFunction;
 };
 
 
+/**
+ * @param {ol.TileLoadFunctionType} tileLoadFunction Tile load function.
+ * @todo api
+ */
+ol.source.TileImage.prototype.setTileLoadFunction = function(tileLoadFunction) {
+  this.tileCache.clear();
+  this.tileLoadFunction = tileLoadFunction;
+  this.dispatchChangeEvent();
+};
+
+
 /**
  * @param {ol.TileUrlFunctionType} tileUrlFunction Tile URL function.
+ * @todo api
  */
 ol.source.TileImage.prototype.setTileUrlFunction = function(tileUrlFunction) {
   // FIXME It should be possible to be more intelligent and avoid clearing the