diff --git a/src/Cloud.ts b/src/Cloud.ts
index 0df7ae95d..83ce78c59 100644
--- a/src/Cloud.ts
+++ b/src/Cloud.ts
@@ -37,8 +37,8 @@ export function run(name: string, data: any, options: RequestOptions): Promise<a
   }
 
   const requestOptions: RequestOptions = {};
-  if (options.useMasterKey) {
-    requestOptions.useMasterKey = options.useMasterKey;
+  if (options.hasOwnProperty('useMasterKey')) {
+    requestOptions.useMasterKey = !!options.useMasterKey;
   }
   if (options.sessionToken) {
     requestOptions.sessionToken = options.sessionToken;
diff --git a/src/__tests__/Cloud-test.js b/src/__tests__/Cloud-test.js
index 49e9a01e5..67045f151 100644
--- a/src/__tests__/Cloud-test.js
+++ b/src/__tests__/Cloud-test.js
@@ -55,7 +55,11 @@ describe('Cloud', () => {
   it('run passes options', () => {
     Cloud.run('myfunction', {}, { useMasterKey: false });
 
-    expect(CoreManager.getCloudController().run.mock.calls[0]).toEqual(['myfunction', {}, {}]);
+    expect(CoreManager.getCloudController().run.mock.calls[0]).toEqual([
+      'myfunction',
+      {},
+      { useMasterKey: false },
+    ]);
 
     Cloud.run('myfunction', {}, { useMasterKey: true });