diff --git a/packages/types/config/build.d.ts b/packages/types/config/build.d.ts
index 0f5567a42770..af39068b1239 100644
--- a/packages/types/config/build.d.ts
+++ b/packages/types/config/build.d.ts
@@ -1,3 +1,4 @@
+/// <reference types="less" />
 /**
  * NuxtOptionsBuild
  * Documentation: https://nuxtjs.org/api/configuration-build