diff --git a/lib/librato.js b/lib/librato.js
index de1c672..800d41c 100644
--- a/lib/librato.js
+++ b/lib/librato.js
@@ -104,7 +104,7 @@ var post_payload = function(options, proto, payload, retry)
         if (/^application\/json/.test(res.headers['content-type'])) {
           var meta = JSON.parse(d),
               re = /'([^']+)' is a \S+, but was submitted as different type/;
-          if (meta.errors && meta.errors.params && meta.errors.params.type.length) {
+          if (meta.errors && meta.errors.params && meta.errors.params.type && meta.errors.params.type.length) {
             var fields = meta.errors.params.type;
             for (var i=0; i < fields.length; i++) {
               var match  = re.exec(fields[i]),