diff --git a/src/storage.ts b/src/storage.ts
index 9f33ab7b7..f805a59b1 100644
--- a/src/storage.ts
+++ b/src/storage.ts
@@ -517,6 +517,7 @@ export class Storage extends Service {
    * @property {number} [timeout] The amount of time in milliseconds to wait per http request before timing out.
    * @property {object[]} [interceptors_] Array of custom request interceptors to be returned in the order they were assigned.
    * @property {string} [apiEndpoint = storage.google.com] The API endpoint of the service used to make requests.
+   * @property {boolean} [useAuthWithCustomEndpoint] Controls whether or not to use authentication when using a custom endpoint.
    */
   /**
    * Constructs the Storage client.
@@ -604,6 +605,7 @@ export class Storage extends Service {
       },
       baseUrl,
       customEndpoint,
+      useAuthWithCustomEndpoint: options?.useAuthWithCustomEndpoint,
       projectIdRequired: false,
       scopes: [
         'https://www.googleapis.com/auth/iam',
diff --git a/test/index.ts b/test/index.ts
index 17404c593..0daca2bc2 100644
--- a/test/index.ts
+++ b/test/index.ts
@@ -170,6 +170,20 @@ describe('Storage', () => {
       assert.strictEqual(calledWith.apiEndpoint, `${apiEndpoint}`);
     });
 
+    it('should propagate the useAuthWithCustomEndpoint option', () => {
+      const useAuthWithCustomEndpoint = true;
+      const apiEndpoint = 'https://some.fake.endpoint';
+      const storage = new Storage({
+        projectId: PROJECT_ID,
+        useAuthWithCustomEndpoint,
+        apiEndpoint,
+      });
+      const calledWith = storage.calledWith_[0];
+      assert.strictEqual(calledWith.apiEndpoint, 'https://some.fake.endpoint');
+      assert.strictEqual(calledWith.customEndpoint, true);
+      assert.strictEqual(calledWith.useAuthWithCustomEndpoint, true);
+    });
+
     it('should propagate autoRetry', () => {
       const autoRetry = false;
       const storage = new Storage({