diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index 9df86cfbde..b2cbd63931 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -2329,21 +2329,25 @@ function wp_maybe_update_network_user_counts() {
  * Update the network-wide site 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_site_counts() {
-	global $wpdb;
+function wp_update_network_site_counts( $network_id = null ) {
+	$network_id = (int) $network_id;
+	if ( ! $network_id ) {
+		$network_id = get_current_network_id();
+	}
 
 	$count = get_sites( array(
-		'network_id' => $wpdb->siteid,
+		'network_id' => $network_id,
 		'spam'       => 0,
 		'deleted'    => 0,
 		'archived'   => 0,
 		'count'      => true,
 	) );
 
-	update_site_option( 'blog_count', $count );
+	update_network_option( $network_id, 'blog_count', $count );
 }
 
 /**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index f9705a8a8f..3be5d05964 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40483';
+$wp_version = '4.8-alpha-40484';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.