diff --git a/lib/hooks/pubsub/index.js b/lib/hooks/pubsub/index.js
index 2e5233d0c9..5e3ded68b3 100644
--- a/lib/hooks/pubsub/index.js
+++ b/lib/hooks/pubsub/index.js
@@ -119,6 +119,9 @@ module.exports = function(sails) {
        */
 
       broadcast: function(roomName, eventName, data, socketToOmit) {
+        if (data.previous && _.isFunction(data.previous.toJSON)) {
+          data.previous = _.clone(data.previous.toJSON(), true);
+        }
         sails.sockets.broadcast(roomName, eventName, data, socketToOmit);
       },