diff --git a/packages/gatsby-plugin-sitemap/src/internals.js b/packages/gatsby-plugin-sitemap/src/internals.js
index 6fbec801358ed..3ac3cf79aa209 100644
--- a/packages/gatsby-plugin-sitemap/src/internals.js
+++ b/packages/gatsby-plugin-sitemap/src/internals.js
@@ -31,7 +31,6 @@ export const runQuery = (handler, query, excludes, pathPrefix) =>
     // siteUrl Validation
     if (
       !r.data.site.siteMetadata.siteUrl ||
-      r.data.site.siteMetadata.siteUrl == null ||
       r.data.site.siteMetadata.siteUrl.trim().length == 0
     ) {
       throw new Error(