diff --git a/src/vs/workbench/contrib/customEditor/browser/customEditors.ts b/src/vs/workbench/contrib/customEditor/browser/customEditors.ts
index 90b2642be0d5fbbf848839bfc15d7f7f126a7245..b128ad655fbf231f5f9f50a821abfc574228e041 100644
--- a/src/vs/workbench/contrib/customEditor/browser/customEditors.ts
+++ b/src/vs/workbench/contrib/customEditor/browser/customEditors.ts
@@ -306,7 +306,7 @@ export class CustomEditorService extends Disposable implements ICustomEditorServ
 
 	private updateContexts() {
 		const activeEditorPane = this.editorService.activeEditorPane;
-		const resource = activeEditorPane?.input.resource;
+		const resource = activeEditorPane?.input?.resource;
 		if (!resource) {
 			this._customEditorContextKey.reset();
 			this._focusedCustomEditorIsEditable.reset();