diff --git a/lib/compat/wordpress-6.8/site-editor.php b/lib/compat/wordpress-6.8/site-editor.php
index 86690a6413e1c..6d7e8cc49e652 100644
--- a/lib/compat/wordpress-6.8/site-editor.php
+++ b/lib/compat/wordpress-6.8/site-editor.php
@@ -130,7 +130,7 @@ function gutenberg_styles_wp_die_handler( $default_handler ) {
  * @global array $submenu
  */
 function gutenberg_add_styles_submenu_item() {
-	if ( ! wp_is_block_theme() ) {
+	if ( ! wp_is_block_theme() && current_theme_supports( 'editor-styles' ) ) {
 		global $submenu;
 
 		$styles_menu_item = array(