diff --git a/lib/utils/script.js b/lib/utils/script.js
index 95eec07..d94a948 100644
--- a/lib/utils/script.js
+++ b/lib/utils/script.js
@@ -69,7 +69,7 @@ utils.script = {
   },
   makeArray: function (type, arrayLength, cb) {
     if (type === null || type === undefined) {
-      type = random.index(['Uint8', 'Float32'])
+      type = random.item(['Uint8', 'Float32'])
     }
     switch (random.number(8)) {
       case 0: