diff --git a/app.js b/app.js
index f810723fbe..baf2c733e5 100644
--- a/app.js
+++ b/app.js
@@ -699,7 +699,7 @@ app.loadHttpStream = function() {
   var subtitlesUrl = document.getElementById('subtitlesUrlInput').value;
   var config = keySystem ?
                {'keySystem': keySystem, 'licenseServerUrl': licenseServerUrl} :
-               {};
+               {'keySystem': ''};
   app.load_(new shaka.player.HttpVideoSource(mediaUrl, subtitlesUrl, config));
 };
 
diff --git a/lib/player/http_video_source.js b/lib/player/http_video_source.js
index 7083d91361..0ca129a1e6 100644
--- a/lib/player/http_video_source.js
+++ b/lib/player/http_video_source.js
@@ -33,8 +33,7 @@ goog.require('shaka.util.StringUtils');
  * Creates an HttpVideoSource.
  * @param {string} mediaUrl The media URL.
  * @param {string} textUrl The text URL, or empty string if no subtitles.
- * @param {shaka.player.DrmInfo.Config} drmInfoConfig A DrmInfo Config object,
- *     an empty object indicates unencrypted content.
+ * @param {shaka.player.DrmInfo.Config} drmInfoConfig A DrmInfo Config object.
  * @struct
  * @constructor
  * @implements {shaka.player.IVideoSource}