diff --git a/src/ol/source/tiledebug.js b/src/ol/source/tiledebug.js
index a62d962da0..4325f16124 100644
--- a/src/ol/source/tiledebug.js
+++ b/src/ol/source/tiledebug.js
@@ -112,3 +112,9 @@ ol.source.TileDebug.Tile_.prototype.getImage = function() {
     return context.canvas;
   }
 };
+
+
+/**
+ * @override
+ */
+ol.source.TileDebug.Tile_.prototype.load = function() {};