diff --git a/src/wp-admin/network/admin.php b/src/wp-admin/network/admin.php
index 01e6ea70c9..c135698d96 100644
--- a/src/wp-admin/network/admin.php
+++ b/src/wp-admin/network/admin.php
@@ -16,6 +16,13 @@ if ( ! is_multisite() )
 	wp_die( __( 'Multisite support is not enabled.' ) );
 
 $redirect_network_admin_request = ( ( $current_blog->domain != $current_site->domain ) || ( $current_blog->path != $current_site->path ) );
+/**
+ * Filter whether to redirect the request to the Network Admin.
+ *
+ * @since 3.2.0
+ *
+ * @param bool $redirect_user_admin_request Whether the request should be redirected.
+ */
 $redirect_network_admin_request = apply_filters( 'redirect_network_admin_request', $redirect_network_admin_request );
 if ( $redirect_network_admin_request ) {
 	wp_redirect( network_admin_url() );