diff --git a/src/wp-includes/ms-settings.php b/src/wp-includes/ms-settings.php
index ab507ba017..1afa77adc4 100644
--- a/src/wp-includes/ms-settings.php
+++ b/src/wp-includes/ms-settings.php
@@ -104,3 +104,11 @@ if ( ! $current_blog instanceof WP_Site ) {
 
 // Define upload directory constants
 ms_upload_constants();
+
+/**
+ * Fires after the current site and network have been detected and loaded
+ * in multisite's bootstrap.
+ *
+ * @since 4.6.0
+ */
+do_action( 'ms_loaded' );