diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index b6bb54b4ba1..53f8a1ea072 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -18,3 +18,4 @@ Patrick Costello <pcostell@google.com>
 Silvano Luciani <silvano@google.com>
 Stephen Sawchuk <sawchuk@gmail.com>
 Anand Suresh <anandsuresh@gmail.com>
+Gabriel Petrovay <gabipetrovay@gmail.com>
diff --git a/lib/compute/zone.js b/lib/compute/zone.js
index 4d02e01a18f..5a57975150b 100644
--- a/lib/compute/zone.js
+++ b/lib/compute/zone.js
@@ -166,7 +166,9 @@ Zone.prototype.createDisk = function(name, config, callback) {
 };
 
 /**
- * Create a virtual machine in this zone.
+ * Create a virtual machine in this zone. If a virtual machine instance already exists
+ * with such a name, the instance is only started. If the virtual machine is already
+ * running this operation has no effect.
  *
  * @resource [Instance Resource]{@link https://cloud.google.com/compute/docs/reference/v1/instances}
  * @resource [Instances: insert API Documentation]{@link https://cloud.google.com/compute/docs/reference/v1/instances/insert}