diff --git a/src/wp-includes/admin-bar.php b/src/wp-includes/admin-bar.php
index fa2017a501..18ca17b5fa 100644
--- a/src/wp-includes/admin-bar.php
+++ b/src/wp-includes/admin-bar.php
@@ -446,8 +446,8 @@ function wp_admin_bar_edit_site_menu( $wp_admin_bar ) {
 function wp_admin_bar_customize_menu( $wp_admin_bar ) {
 	global $wp_customize;
 
-	// Don't show if a block theme is activated.
-	if ( wp_is_block_theme() ) {
+	// Don't show if a block theme is activated and no plugins use the customizer.
+	if ( wp_is_block_theme() && ! has_action( 'customize_register' ) ) {
 		return;
 	}