diff --git a/src/ol/tile.js b/src/ol/tile.js
index ce00f9a1db..6b8956352b 100644
--- a/src/ol/tile.js
+++ b/src/ol/tile.js
@@ -1,3 +1,5 @@
+// FIXME should inQueue be private?
+
 goog.provide('ol.Tile');
 goog.provide('ol.TileState');