diff --git a/lib/OpenLayers/Layer/Google/v3.js b/lib/OpenLayers/Layer/Google/v3.js
index bf8618130a..b99d93bffc 100644
--- a/lib/OpenLayers/Layer/Google/v3.js
+++ b/lib/OpenLayers/Layer/Google/v3.js
@@ -11,10 +11,15 @@
 /**
  * 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.
+ * Mixin providing functionality specific to the Google Maps API v3 <= v3.6.
+ * 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. To use this layer,
+ * you must include the GMaps API (<= v3.6) in your html:
+ *
+ * (code)
+ * <script src="http://maps.google.com/maps/api/js?v=3.6&amp;sensor=false"></script>
+ * (end)
  */
 OpenLayers.Layer.Google.v3 = {