diff --git a/lib/OpenLayers/Control/CacheWrite.js b/lib/OpenLayers/Control/CacheWrite.js
index e6ca6f62b6..0311fde801 100644
--- a/lib/OpenLayers/Control/CacheWrite.js
+++ b/lib/OpenLayers/Control/CacheWrite.js
@@ -13,6 +13,9 @@
  * <OpenLayers.Control.CacheRead> control is used to fetch and use the cached
  * tile images.
  *
+ * Note: Before using this control on any layer that is not your own, make sure
+ * that the terms of service of the tile provider allow local storage of tiles.
+ *
  * Inherits from:
  *  - <OpenLayers.Control>
  */