diff --git a/lib/tritonapi.js b/lib/tritonapi.js
index 99cae9d..0bad6c2 100644
--- a/lib/tritonapi.js
+++ b/lib/tritonapi.js
@@ -171,7 +171,12 @@ TritonApi.prototype._cacheGetJson = function _cacheGetJson(key, cb) {
 
 
 /**
- * cloudapi listImages wrapper with optional caching
+ * CloudAPI listImages wrapper with optional caching.
+ *
+ * @param opts {Object} Optional.
+ *      - useCase {Boolean} Whether to use Triton's local cache.
+ *      - ... all other cloudapi ListImages options
+ * @param {Function} callback `function (err, imgs)`
  */
 TritonApi.prototype.listImages = function listImages(opts, cb) {
     var self = this;
@@ -183,6 +188,9 @@ TritonApi.prototype.listImages = function listImages(opts, cb) {
     assert.optionalBool(opts.useCache, 'opts.useCache');
     assert.func(cb, 'cb');
 
+    var listOpts = common.objCopy(opts);
+    delete listOpts.useCache;
+
     var cacheKey = 'images.json';
     var cached;
     var fetched;
@@ -207,7 +215,7 @@ TritonApi.prototype.listImages = function listImages(opts, cb) {
                 return next();
             }
 
-            self.cloudapi.listImages(opts, function (err, imgs, res_) {
+            self.cloudapi.listImages(listOpts, function (err, imgs, res_) {
                 if (err) {
                     return next(err);
                 }