diff --git a/static/js/services/filedata.js b/static/js/services/filedata.js
index fb591df7..1ac6a5a5 100644
--- a/static/js/services/filedata.js
+++ b/static/js/services/filedata.js
@@ -56,6 +56,7 @@ define(["jquery", "underscore", "sha", "webrtc.adapter"], function($, _, jsSHA)
 			});
 			this.file = {
 				toURL: function() {
+					// TODO: only create once and revoke URL when no longer needed
 					return URL.createObjectURL(data);
 				}
 			}