diff --git a/wp-admin/includes/update-core.php b/wp-admin/includes/update-core.php
index 7e1fc3f114..b8bb0c1195 100644
--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -709,7 +709,7 @@ $_old_files = array(
 // Don't delete, yet: 'wp-admin/includes/class-wp-upgrader-skins.php',
 // Don't delete, yet: 'wp-includes/class-feed.php',
 'wp-includes/locale.php',
-'wp-includes/session.php',
+// Don't delete, yet: 'wp-includes/session.php',
 'wp-includes/customize/class-wp-customize-themes-panel.php', // Removed in beta; when the feature comes back remember to remove it from this array. See #37661.
 );
 
diff --git a/wp-includes/session.php b/wp-includes/session.php
new file mode 100644
index 0000000000..d9175c9895
--- /dev/null
+++ b/wp-includes/session.php
@@ -0,0 +1,11 @@
+<?php
+/**
+ * Session API
+ *
+ * @since 4.0.0
+ */
+
+_deprecated_file( basename( __FILE__ ), '4.7.0' );
+
+require_once( ABSPATH . WPINC . '/class-wp-session-tokens.php' );
+require_once( ABSPATH . WPINC . '/class-wp-user-meta-session-tokens.php' );
\ No newline at end of file
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 38fbb36e62..0e08f7c0a6 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39451';
+$wp_version = '4.8-alpha-39453';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.