diff --git a/packages/gatsby-plugin-sitemap/README.md b/packages/gatsby-plugin-sitemap/README.md
index 94d5cc32edd8c..2a0bd00eafd97 100644
--- a/packages/gatsby-plugin-sitemap/README.md
+++ b/packages/gatsby-plugin-sitemap/README.md
@@ -35,7 +35,7 @@ siteMetadata: {
 },
 plugins: [
   {
-    resolve: `gatsby-plugin-sitemap`
+    resolve: `gatsby-plugin-sitemap`,
     options: {
       output: `/some-other-sitemap.xml`,
       query: `