diff --git a/lib/OpenLayers/Layer/Google/v3.js b/lib/OpenLayers/Layer/Google/v3.js
index 5b225f056b..8440b1dfe2 100644
--- a/lib/OpenLayers/Layer/Google/v3.js
+++ b/lib/OpenLayers/Layer/Google/v3.js
@@ -11,6 +11,9 @@
  * Constant: OpenLayers.Layer.Google.v3
  * 
  * Mixin providing functionality specific to the Google Maps API v3. Note that
+ * this layer configures the google.maps.map object with the "disableDefaultUI"
+ * option set to true. Using UI controls that the Google Maps API provides is
+ * not supported by the OpenLayers API.
  */
 OpenLayers.Layer.Google.v3 = {