diff --git a/src/lib/errors.js b/src/lib/errors.js
index db6b40c24..03c4e00da 100644
--- a/src/lib/errors.js
+++ b/src/lib/errors.js
@@ -117,6 +117,12 @@ var statusCodes = {
    */
   500: 'Internal Server Error',
 
+  /**
+   * TooManyRequests
+   * @param {String} [msg] - An error message that will probably end up in a log.
+   */
+  429: 'Too Many Requests',
+
   /**
    * PreconditionFailed
    * @param {String} [msg] - An error message that will probably end up in a log.