diff --git a/wp-includes/ms-site.php b/wp-includes/ms-site.php
index 1862374..575cf7c 100644
--- a/wp-includes/ms-site.php
+++ b/wp-includes/ms-site.php
@@ -130,7 +130,7 @@ function wp_insert_site( array $data ) {
 		 * @param int    $network_id Network ID. Only relevant on multi-network installations.
 		 * @param array  $meta       Meta data. Used to set initial site options.
 		 */
-		do_action_deprecated( 'wpmu_new_blog', array( $new_site->id, $user_id, $new_site->domain, $new_site->path, $new_site->network_id, $meta ), '5.1.0', 'wp_insert_site' );
+		do_action_deprecated( 'wpmu_new_blog', array( $new_site->id, $user_id, $new_site->domain, $new_site->path, $new_site->network_id, $meta ), '5.1.0', 'wp_initialize_site' );
 	}
 
 	return (int) $new_site->id;