diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index b2cbd63931..e024789052 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -2354,14 +2354,17 @@ function wp_update_network_site_counts( $network_id = null ) {
  * Update the network-wide user count.
  *
  * @since 3.7.0
+ * @since 4.8.0 The $network_id parameter has been added.
  *
  * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int|null $network_id ID of the network. Default is the current network.
  */
-function wp_update_network_user_counts() {
+function wp_update_network_user_counts( $network_id = null ) {
 	global $wpdb;
 
 	$count = $wpdb->get_var( "SELECT COUNT(ID) as c FROM $wpdb->users WHERE spam = '0' AND deleted = '0'" );
-	update_site_option( 'user_count', $count );
+	update_network_option( $network_id, 'user_count', $count );
 }
 
 /**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3be5d05964..6b9e9f4b88 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40484';
+$wp_version = '4.8-alpha-40485';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.