diff --git a/lib/client/client.js b/lib/client/client.js
index b982c3a..4f52dde 100644
--- a/lib/client/client.js
+++ b/lib/client/client.js
@@ -238,6 +238,8 @@ Client.prototype.add = function add (name, entry, controls, callback) {
         save[k].forEach(function (v) {
           attr.addValue(v.toString())
         })
+      } else if (Buffer.isBuffer(save[k])) {
+        attr.addValue(save[k]);
       } else {
         attr.addValue(save[k].toString())
       }