diff --git a/website/docs/r/container_cluster.html.markdown b/website/docs/r/container_cluster.html.markdown
index a92b0845..852a13a9 100644
--- a/website/docs/r/container_cluster.html.markdown
+++ b/website/docs/r/container_cluster.html.markdown
@@ -79,7 +79,7 @@ output "cluster_ca_certificate" {
     The region to create the cluster in, for
     [Regional Clusters](https://cloud.google.com/kubernetes-engine/docs/concepts/multi-zone-and-regional-clusters#regional).
     In a Regional Cluster, the number of nodes specified in `initial_node_count` is 
-    created in all zones of the region.
+    created in three zones of the region (this can be changed by setting `additional_zones`).
 
 * `additional_zones` - (Optional) The list of additional Google Compute Engine
     locations in which the cluster's nodes should be located. If additional zones are