diff --git a/wp-includes/class-wp-network.php b/wp-includes/class-wp-network.php
index 3ba7fac6ce..0a8d12696d 100644
--- a/wp-includes/class-wp-network.php
+++ b/wp-includes/class-wp-network.php
@@ -63,7 +63,7 @@ class WP_Network {
 	 * @access private
 	 * @var string
 	 */
-	private $blog_id = 0;
+	private $blog_id = '0';
 
 	/**
 	 * Domain used to set cookies for this network.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index f396efdf8e..1dd2599574 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-alpha-37870';
+$wp_version = '4.6-alpha-37871';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.