diff --git a/lib/helpers/model/castBulkWrite.js b/lib/helpers/model/castBulkWrite.js
index f4e15648979..f724afb0b31 100644
--- a/lib/helpers/model/castBulkWrite.js
+++ b/lib/helpers/model/castBulkWrite.js
@@ -34,6 +34,9 @@ module.exports = function castBulkWrite(model, op, options) {
     op = op['updateOne'];
     return (callback) => {
       try {
+        if (!op['filter']) throw new Error('Must provide a filter object.');
+        if (!op['update']) throw new Error('Must provide an update object.');
+
         op['filter'] = cast(model.schema, op['filter']);
         op['update'] = castUpdate(model.schema, op['update'], {
           strict: model.schema.options.strict,
@@ -61,6 +64,9 @@ module.exports = function castBulkWrite(model, op, options) {
     op = op['updateMany'];
     return (callback) => {
       try {
+        if (!op['filter']) throw new Error('Must provide a filter object.');
+        if (!op['update']) throw new Error('Must provide an update object.');
+
         op['filter'] = cast(model.schema, op['filter']);
         op['update'] = castUpdate(model.schema, op['update'], {
           strict: model.schema.options.strict,