diff --git a/wp-includes/sitemaps.php b/wp-includes/sitemaps.php
index 214eb3ac1a..f3bd6d1dfc 100644
--- a/wp-includes/sitemaps.php
+++ b/wp-includes/sitemaps.php
@@ -63,7 +63,7 @@ function wp_get_sitemap_providers() {
  * @param WP_Sitemaps_Provider $provider The `Sitemaps_Provider` instance implementing the sitemap.
  * @return bool Returns true if the sitemap was added. False on failure.
  */
-function wp_register_sitemap( $name, WP_Sitemaps_Provider $provider ) {
+function wp_register_sitemap_provider( $name, WP_Sitemaps_Provider $provider ) {
 	$sitemaps = wp_sitemaps_get_server();
 	return $sitemaps->registry->add_provider( $name, $provider );
 }
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 486028132c..54838ee283 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta3-48552';
+$wp_version = '5.5-beta3-48553';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.