diff --git a/packages/mongo-livedata/collection.js b/packages/mongo-livedata/collection.js
index 963862c93d..8b72c6a822 100644
--- a/packages/mongo-livedata/collection.js
+++ b/packages/mongo-livedata/collection.js
@@ -256,7 +256,6 @@ Meteor.Collection._rewriteSelector = function (selector) {
 
 var throwIfSelectorIsNotId = function (selector, methodName) {
   if (!LocalCollection._selectorIsIdPerhapsAsObject(selector)) {
-    // XXX look at string
     throw new Meteor.Error(
       403, "Not permitted. Untrusted code may only " + methodName +
         " documents by ID.");