diff --git a/src/wp-admin/includes/schema.php b/src/wp-admin/includes/schema.php
index 162651a418..b2009958a6 100644
--- a/src/wp-admin/includes/schema.php
+++ b/src/wp-admin/includes/schema.php
@@ -936,7 +936,7 @@ We hope you enjoy your new site. Thanks!
 		$current_site->domain = $domain;
 		$current_site->path = $path;
 		$current_site->site_name = ucfirst( $domain );
-		$wpdb->insert( $wpdb->blogs, array( 'site_id' => $network_id, 'domain' => $domain, 'path' => $path, 'registered' => current_time( 'mysql' ) ) );
+		$wpdb->insert( $wpdb->blogs, array( 'site_id' => $network_id, 'blog_id' => 1, 'domain' => $domain, 'path' => $path, 'registered' => current_time( 'mysql' ) ) );
 		$current_site->blog_id = $blog_id = $wpdb->insert_id;
 		update_user_meta( $site_user->ID, 'source_domain', $domain );
 		update_user_meta( $site_user->ID, 'primary_blog', $blog_id );