diff --git a/lib/random/random.js b/lib/random/random.js
index 9e482c1..3811eef 100644
--- a/lib/random/random.js
+++ b/lib/random/random.js
@@ -50,7 +50,7 @@ var random = { // eslint-disable-line no-unused-vars
     return Math.exp(this.float() * Math.log(limit))
   },
   item: function (list) {
-    if (list === undefined || typeof list === 'string' || !list.hasOwnProperty('length')) {
+    if (list === undefined || typeof list === 'string' || list.length === undefined) {
       logger.traceback()
       throw new TypeError('random.item() received an invalid object: \'' + list + '\'')
     }