diff --git a/lib/http-api.js b/lib/http-api.js
index 2a5be70f8..35dcbb4c7 100644
--- a/lib/http-api.js
+++ b/lib/http-api.js
@@ -596,7 +596,7 @@ module.exports.MatrixHttpApi.prototype = {
      * @param {object=} opts.headers  extra request headers
      *
      * @param {number=} opts.localTimeoutMs client-side timeout for the
-     *    request. Default timeout if undefined.
+     *    request. Default timeout if falsy.
      *
      * @param {function=} opts.bodyParser function to parse the body of the
      *    response before passing it to the promise and callback.