diff --git a/src/vs/editor/browser/widget/multiDiffEditorWidget/workbenchUIElementFactory.ts b/src/vs/editor/browser/widget/multiDiffEditorWidget/workbenchUIElementFactory.ts
index 27be4ad2555..54b29691c96 100644
--- a/src/vs/editor/browser/widget/multiDiffEditorWidget/workbenchUIElementFactory.ts
+++ b/src/vs/editor/browser/widget/multiDiffEditorWidget/workbenchUIElementFactory.ts
@@ -13,7 +13,7 @@ import { URI } from 'vs/base/common/uri';
  * This would make monaco-editor consumption much more difficult though.
  */
 export interface IWorkbenchUIElementFactory {
-	createResourceLabel(element: HTMLElement): IResourceLabel;
+	createResourceLabel?(element: HTMLElement): IResourceLabel;
 }
 
 export interface IResourceLabel extends IDisposable {
diff --git a/src/vs/editor/standalone/browser/standaloneEditor.ts b/src/vs/editor/standalone/browser/standaloneEditor.ts
index aa584e5e6af..3de996e87e1 100644
--- a/src/vs/editor/standalone/browser/standaloneEditor.ts
+++ b/src/vs/editor/standalone/browser/standaloneEditor.ts
@@ -102,7 +102,7 @@ export function createDiffEditor(domElement: HTMLElement, options?: IStandaloneD
 
 export function createMultiFileDiffEditor(domElement: HTMLElement, override?: IEditorOverrideServices) {
 	const instantiationService = StandaloneServices.initialize(override || {});
-	return new MultiDiffEditorWidget(domElement, instantiationService);
+	return new MultiDiffEditorWidget(domElement, {}, instantiationService);
 }
 
 /**