diff --git a/wp-admin/includes/ms.php b/wp-admin/includes/ms.php
index 596f9e5dc5..4c19b5685b 100644
--- a/wp-admin/includes/ms.php
+++ b/wp-admin/includes/ms.php
@@ -792,15 +792,11 @@ function choose_primary_blog() {
  *
  * @since 3.1.0
  *
- * @global wpdb $wpdb WordPress database abstraction object.
- *
  * @param int $network_id The network ID to check.
  * @return bool True if network can be edited, otherwise false.
  */
 function can_edit_network( $network_id ) {
-	global $wpdb;
-
-	if ( $network_id == $wpdb->siteid )
+	if ( $network_id == get_current_network_id() )
 		$result = true;
 	else
 		$result = false;
diff --git a/wp-includes/ms-blogs.php b/wp-includes/ms-blogs.php
index f5bf972227..a3f40b8358 100644
--- a/wp-includes/ms-blogs.php
+++ b/wp-includes/ms-blogs.php
@@ -1091,7 +1091,7 @@ function get_last_updated( $deprecated = '', $start = 0, $quantity = 40 ) {
 	if ( ! empty( $deprecated ) )
 		_deprecated_argument( __FUNCTION__, 'MU' ); // never used
 
-	return $wpdb->get_results( $wpdb->prepare("SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' AND last_updated != '0000-00-00 00:00:00' ORDER BY last_updated DESC limit %d, %d", $wpdb->siteid, $start, $quantity ) , ARRAY_A );
+	return $wpdb->get_results( $wpdb->prepare( "SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' AND last_updated != '0000-00-00 00:00:00' ORDER BY last_updated DESC limit %d, %d", get_current_network_id(), $start, $quantity ), ARRAY_A );
 }
 
 /**
diff --git a/wp-includes/ms-deprecated.php b/wp-includes/ms-deprecated.php
index b6c9960897..9eff20eb16 100644
--- a/wp-includes/ms-deprecated.php
+++ b/wp-includes/ms-deprecated.php
@@ -187,7 +187,7 @@ function get_blog_list( $start = 0, $num = 10, $deprecated = '' ) {
 	_deprecated_function( __FUNCTION__, '3.0.0', 'wp_get_sites()' );
 
 	global $wpdb;
-	$blogs = $wpdb->get_results( $wpdb->prepare("SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' ORDER BY registered DESC", $wpdb->siteid), ARRAY_A );
+	$blogs = $wpdb->get_results( $wpdb->prepare( "SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' ORDER BY registered DESC", get_current_network_id() ), ARRAY_A );
 
 	$blog_list = array();
 	foreach ( (array) $blogs as $details ) {
@@ -430,7 +430,7 @@ function get_admin_users_for_domain( $domain = '', $path = '' ) {
 	global $wpdb;
 
 	if ( ! $domain )
-		$network_id = $wpdb->siteid;
+		$network_id = get_current_network_id();
 	else
 		$network_id = $wpdb->get_var( $wpdb->prepare( "SELECT id FROM $wpdb->site WHERE domain = %s AND path = %s", $domain, $path ) );
 
@@ -447,8 +447,6 @@ function get_admin_users_for_domain( $domain = '', $path = '' ) {
  * @deprecated 4.6.0 Use get_sites()
  * @see get_sites()
  *
- * @global wpdb $wpdb WordPress database abstraction object.
- *
  * @param array $args {
  *     Array of default arguments. Optional.
  *
@@ -468,15 +466,13 @@ function get_admin_users_for_domain( $domain = '', $path = '' ) {
  *               values for whether the site is public, archived, mature, spam, and/or deleted.
  */
 function wp_get_sites( $args = array() ) {
-	global $wpdb;
-
 	_deprecated_function( __FUNCTION__, '4.6.0', 'get_sites()' );
 
 	if ( wp_is_large_network() )
 		return array();
 
 	$defaults = array(
-		'network_id' => $wpdb->siteid,
+		'network_id' => get_current_network_id(),
 		'public'     => null,
 		'archived'   => null,
 		'mature'     => null,
diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index 1841580fe0..a0190571da 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -72,7 +72,7 @@ function get_active_blog_for_user( $user_id ) {
 		$ret = false;
 		if ( is_array( $blogs ) && count( $blogs ) > 0 ) {
 			foreach ( (array) $blogs as $blog_id => $blog ) {
-				if ( $blog->site_id != $wpdb->siteid )
+				if ( $blog->site_id != get_current_network_id() )
 					continue;
 				$details = get_site( $blog_id );
 				if ( is_object( $details ) && $details->archived == 0 && $details->spam == 0 && $details->deleted == 0 ) {
@@ -1089,7 +1089,7 @@ function wpmu_activate_signup($key) {
 		return array( 'user_id' => $user_id, 'password' => $password, 'meta' => $meta );
 	}
 
-	$blog_id = wpmu_create_blog( $signup->domain, $signup->path, $signup->title, $user_id, $meta, $wpdb->siteid );
+	$blog_id = wpmu_create_blog( $signup->domain, $signup->path, $signup->title, $user_id, $meta, get_current_network_id() );
 
 	// TODO: What to do if we create a user but cannot create a blog?
 	if ( is_wp_error($blog_id) ) {
diff --git a/wp-includes/option.php b/wp-includes/option.php
index 5c96f2270c..1ea13263a5 100644
--- a/wp-includes/option.php
+++ b/wp-includes/option.php
@@ -223,7 +223,7 @@ function wp_load_core_site_options( $network_id = null ) {
 		return;
 
 	if ( empty($network_id) )
-		$network_id = $wpdb->siteid;
+		$network_id = get_current_network_id();
 
 	$core_options = array('site_name', 'siteurl', 'active_sitewide_plugins', '_site_transient_timeout_theme_roots', '_site_transient_theme_roots', 'site_admins', 'can_compress_scripts', 'global_terms_enabled', 'ms_files_rewriting' );
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 136a579776..730504ff12 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41241';
+$wp_version = '4.9-alpha-41242';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-signup.php b/wp-signup.php
index 5ec0f2ddec..e119b982a8 100644
--- a/wp-signup.php
+++ b/wp-signup.php
@@ -354,7 +354,7 @@ function signup_another_blog( $blogname = '', $blog_title = '', $errors = '' ) {
  *                   The function halts all execution if the user is not logged in.
  */
 function validate_another_blog_signup() {
-	global $wpdb, $blogname, $blog_title, $errors, $domain, $path;
+	global $blogname, $blog_title, $errors, $domain, $path;
 	$current_user = wp_get_current_user();
 	if ( ! is_user_logged_in() ) {
 		die();
@@ -422,7 +422,7 @@ function validate_another_blog_signup() {
 	 */
 	$meta = apply_filters( 'add_signup_meta', $meta_defaults );
 
-	$blog_id = wpmu_create_blog( $domain, $path, $blog_title, $current_user->ID, $meta, $wpdb->siteid );
+	$blog_id = wpmu_create_blog( $domain, $path, $blog_title, $current_user->ID, $meta, get_current_network_id() );
 
 	if ( is_wp_error( $blog_id ) ) {
 		return false;