diff --git a/lib/protocol-buffers-meta.js b/lib/protocol-buffers-meta.js
index fed1a6b..a73e5f3 100644
--- a/lib/protocol-buffers-meta.js
+++ b/lib/protocol-buffers-meta.js
@@ -9,6 +9,9 @@ var ProtocolBuffersMeta = function ProtocolBuffersMeta(options) {
 util.inherits(ProtocolBuffersMeta, Meta);
 
 ProtocolBuffersMeta.prototype.loadResponse = function(response) {
+
+  if(response.key !== undefined) this.key = response.key;
+
   if (response.content !== undefined) {
     var content = response.content[0];
     this.contentType = content.content_type;