diff --git a/types/index.d.ts b/types/index.d.ts
index ef8bfb5a..5ac2d625 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -104,7 +104,7 @@ declare namespace fastifyMultipart {
     [fieldname: string]: Multipart | Multipart[] | undefined;
   }
 
-  export interface FastifyMultipartBaseOptions {
+  export interface FastifyMultipartBaseOptions extends Partial<BusboyConfig> {
     /**
      * Add a shared schema to validate the input fields
      */
diff --git a/types/index.test-d.ts b/types/index.test-d.ts
index 4237d966..f05e0cdc 100644
--- a/types/index.test-d.ts
+++ b/types/index.test-d.ts
@@ -14,6 +14,7 @@ const runServer = async () => {
   const app = fastify()
 
   app.register(fastifyMultipart, {
+    preservePath: true, // field inherited from `BusboyConfig` interface
     attachFieldsToBody: true,
     limits: {
       parts: 500