diff --git a/packages/minimongo/minimongo.js b/packages/minimongo/minimongo.js
index 6d920b26fb..8d161fdad6 100644
--- a/packages/minimongo/minimongo.js
+++ b/packages/minimongo/minimongo.js
@@ -156,6 +156,7 @@ LocalCollection.Cursor.prototype.forEach = function (callback) {
 };
 
 LocalCollection.Cursor.prototype.getFactory = function () {
+  var self = this;
   return self._factory;
 };
 
diff --git a/packages/mongo-livedata/mongo_driver.js b/packages/mongo-livedata/mongo_driver.js
index e522d5ba4c..f7ecd9b39f 100644
--- a/packages/mongo-livedata/mongo_driver.js
+++ b/packages/mongo-livedata/mongo_driver.js
@@ -362,6 +362,7 @@ var Cursor = function (mongo, cursorDescription) {
 
   self._mongo = mongo;
   self._cursorDescription = cursorDescription;
+  if (cursorDescription.options.factory)
   self._synchronousCursor = null;
 };
 
@@ -455,11 +456,14 @@ _Mongo.prototype._createSynchronousCursor = function (cursorDescription) {
   if (!result[0])
     throw result[1];
 
-  return new SynchronousCursor(result[1]);
+  return new SynchronousCursor(result[1],
+                               cursorDescription.options &&
+                               cursorDescription.options.factory);
 };
 
-var SynchronousCursor = function (dbCursor) {
+var SynchronousCursor = function (dbCursor, factory) {
   var self = this;
+  self._factory = factory;
   self._dbCursor = dbCursor;
   // Need to specify that the callback is the first argument to nextObject,
   // since otherwise when we try to call it with no args the driver will
@@ -477,6 +481,8 @@ _.extend(SynchronousCursor.prototype, {
       var doc = self._synchronousNextObject().wait();
       if (!doc || !doc._id) return null;
       doc = replaceTypes(doc, replaceMongoAtomWithMeteor);
+      if (self._factory)
+        doc = self._factory(doc);
       var strId = Meteor.idStringify(doc._id);
       if (self._visitedIds[strId]) continue;
       self._visitedIds[strId] = true;
diff --git a/packages/mongo-livedata/mongo_livedata_tests.js b/packages/mongo-livedata/mongo_livedata_tests.js
index d6ede91ea0..a481bd2e1f 100644
--- a/packages/mongo-livedata/mongo_livedata_tests.js
+++ b/packages/mongo-livedata/mongo_livedata_tests.js
@@ -3,10 +3,13 @@
 
 (function () {
 //var Future = __meteor_bootstrap__.require('fibers/future');
-
+var FACTORIES = {};
 if (Meteor.isServer) {
   Meteor.methods({
     createInsecureCollection: function (name, options) {
+      if (options && options.defaultFactoryName) {
+        options.defaultFactory = FACTORIES[options.defaultFactoryName];
+      }
       var c = new Meteor.Collection(name, options);
       c._insecure = true;
       Meteor.publish('c-' + name, function () {
@@ -625,6 +628,37 @@ testAsyncMulti('mongo-livedata - document with a date, ' + idGeneration, [
   }
 ]);
 
+testAsyncMulti('mongo-livedata - document goes through a factory, ' + idGeneration, [
+  function (test, expect) {
+    var seconds = function (doc) {
+      doc.seconds = function () {return doc.d.getSeconds();};
+      return doc;
+    };
+    FACTORIES["seconds"] = seconds;
+    var collectionOptions = {
+      idGeneration: idGeneration,
+      defaultFactory: seconds,
+      defaultFactoryName: "seconds"
+    };
+    var collectionName = Random.id();
+    if (Meteor.isClient) {
+      Meteor.call('createInsecureCollection', collectionName, collectionOptions);
+      Meteor.subscribe('c-' + collectionName);
+    }
+
+    var coll = new Meteor.Collection(collectionName, collectionOptions);
+    var docId;
+    coll.insert({d: new Date(1356152390004)}, expect(function (err, id) {
+      test.isFalse(err);
+      test.isTrue(id);
+      docId = id;
+      var cursor = coll.find();
+      test.equal(cursor.count(), 1);
+      test.equal(coll.findOne().seconds(), 50);
+    }));
+  }
+]);
+
 testAsyncMulti('mongo-livedata - document with binary data, ' + idGeneration, [
   function (test, expect) {
     var bin = EJSON._base64Decode(
diff --git a/packages/spark/spark.js b/packages/spark/spark.js
index 9736565100..9fb05119af 100644
--- a/packages/spark/spark.js
+++ b/packages/spark/spark.js
@@ -988,7 +988,12 @@ Spark.list = function (cursor, itemFunc, elseFunc) {
       later(function () {
         var doc = EJSON.clone(fields);
         doc._id = id;
-        var frag = Spark.render(_.bind(itemFunc, null, doc));
+        var renderDoc = doc;
+        if (cursor.getFactory && cursor.getFactory()) {
+          console.log(cursor.getFactory());
+          renderDoc = EJSON.clone(renderDoc);
+        }
+        var frag = Spark.render(_.bind(itemFunc, null, renderDoc));
         DomUtils.wrapFragmentForContainer(frag, outerRange.containerNode());
         var range = makeRange(Spark._ANNOTATION_LIST_ITEM, frag);
 
@@ -1038,7 +1043,10 @@ Spark.list = function (cursor, itemFunc, elseFunc) {
         if (!elt)
           throw new Error("Unknown id for changed: " + id);
         applyChanges(elt.doc, fields);
-        Spark.renderToRange(elt.liveRange, _.bind(itemFunc, null, elt.doc));
+        var renderDoc = elt.doc;
+        if (cursor.getFactory && cursor.getFactory())
+          renderDoc = cursor.getFactory()(EJSON.clone(elt.doc));
+        Spark.renderToRange(elt.liveRange, _.bind(itemFunc, null, renderDoc));
       });
     }
   });