diff --git a/types/gh-pages/index.d.ts b/types/gh-pages/index.d.ts
index e88b679ce6..59a62fc25f 100644
--- a/types/gh-pages/index.d.ts
+++ b/types/gh-pages/index.d.ts
@@ -30,3 +30,5 @@ export function publish(
     basePath: string,
     config: PublishOptions,
     callback?: (err: any) => void): void;
+
+export function clean(): void;