Index: src/wp-admin/includes/update-core.php
===================================================================
--- src/wp-admin/includes/update-core.php	(revision 38995)
+++ src/wp-admin/includes/update-core.php	(working copy)
@@ -748,7 +748,7 @@
 
 // If not explicitly defined as false, don't install new default themes.
 if ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || CORE_UPGRADE_SKIP_NEW_BUNDLED ) {
-	$_new_bundled_files = array( 'plugins/akismet/' => '2.0' );
+	$_new_bundled_files = array( 'plugins/akismet/' => '2.0', 'themes/twentyseventeen/' => '4.7' );
 }
 
 /**