diff --git a/wp-includes/class-wp-theme-json.php b/wp-includes/class-wp-theme-json.php
index 2be6a2a939..26e997e5f3 100644
--- a/wp-includes/class-wp-theme-json.php
+++ b/wp-includes/class-wp-theme-json.php
@@ -629,6 +629,7 @@ class WP_Theme_JSON {
 		// The block classes are necessary to target older content that won't use the new class names.
 		'caption' => '.wp-element-caption, .wp-block-audio figcaption, .wp-block-embed figcaption, .wp-block-gallery figcaption, .wp-block-image figcaption, .wp-block-table figcaption, .wp-block-video figcaption',
 		'cite'    => 'cite',
+		'select'  => 'select',
 	);
 
 	const __EXPERIMENTAL_ELEMENT_CLASS_NAMES = array(
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 312619a72c..1be37583fc 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-61030';
+$wp_version = '6.9-alpha-61031';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.