diff --git a/lib/cloudapi2.js b/lib/cloudapi2.js
index eeb617f..44f03c2 100644
--- a/lib/cloudapi2.js
+++ b/lib/cloudapi2.js
@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright 2015 Joyent, Inc.
+ * Copyright 2017 Joyent, Inc.
  *
  * Client library for the SmartDataCenter Cloud API (cloudapi).
  * http://apidocs.joyent.com/cloudapi/
@@ -2318,17 +2318,27 @@ CloudApi.prototype.createVolume = function createVolume(options, cb) {
     assert.object(options, 'options');
     assert.optionalString(options.name, 'options.name');
     assert.optionalNumber(options.size, 'options.size');
-    assert.optionalArrayOfUuid(options.networks, 'options.networks');
+    assert.optionalArrayOfObject(options.networks, 'options.networks');
     assert.string(options.type, 'options.type');
     assert.func(cb, 'cb');
 
+    // options.networks is an array of objects that looks like:
+    // [{
+    //     "id":"2456155a-6459-47ba-9c9a-a77b4e781a5b",
+    //     "name":"sdc_nat",
+    //     "public":true
+    // }]
+    var networkList = options.networks.map(function _mapNetworks(network) {
+        return network.id
+    });
+
     this._request({
         method: 'POST',
         path: format('/%s/volumes', this.account),
         data: {
             name: options.name,
             size: options.size,
-            networks: options.networks,
+            networks: networkList,
             type: options.type
         }
     }, function (err, req, res, body) {