diff --git a/packages/docusaurus-plugin-sitemap/src/index.ts b/packages/docusaurus-plugin-sitemap/src/index.ts
index e228d1d2d7cf..2d8f2b3af372 100644
--- a/packages/docusaurus-plugin-sitemap/src/index.ts
+++ b/packages/docusaurus-plugin-sitemap/src/index.ts
@@ -9,7 +9,7 @@ import fs from 'fs-extra';
 import path from 'path';
 import logger from '@docusaurus/logger';
 import createSitemap from './createSitemap';
-import type {PluginOptions, Options} from './options';
+import type {PluginOptions, Options, CreateSitemapItemsOption} from './options';
 import type {LoadContext, Plugin} from '@docusaurus/types';
 
 export default function pluginSitemap(
@@ -47,4 +47,4 @@ export default function pluginSitemap(
 }
 
 export {validateOptions} from './options';
-export type {PluginOptions, Options};
+export type {PluginOptions, Options, CreateSitemapItemsOption};
diff --git a/packages/docusaurus-plugin-sitemap/src/options.ts b/packages/docusaurus-plugin-sitemap/src/options.ts
index a05a1c74b8f3..7ea5cc6fa415 100644
--- a/packages/docusaurus-plugin-sitemap/src/options.ts
+++ b/packages/docusaurus-plugin-sitemap/src/options.ts
@@ -55,7 +55,7 @@ export type PluginOptions = {
   createSitemapItems?: CreateSitemapItemsOption;
 };
 
-type CreateSitemapItemsOption = (
+export type CreateSitemapItemsOption = (
   params: CreateSitemapItemsParams & {
     defaultCreateSitemapItems: CreateSitemapItemsFn;
   },