diff --git a/lib/persisted-model.js b/lib/persisted-model.js
index 65ec8524..b14e22a7 100644
--- a/lib/persisted-model.js
+++ b/lib/persisted-model.js
@@ -966,7 +966,11 @@ module.exports = function(registry) {
       setRemoting(PersistedModel, 'bulkUpdate', {
         description: 'Run multiple updates at once. Note: this is not atomic.',
         accessType: 'WRITE',
-        accepts: {arg: 'updates', type: 'array'},
+        accepts: [{arg: 'updates', type: 'array'},
+                 {
+        arg: 'options',
+        type: 'object',
+      }],
         http: {verb: 'post', path: '/bulk-update'},
       });