diff --git a/wp-includes/theme.php b/wp-includes/theme.php
index ee544e25dc..c3d5003f75 100644
--- a/wp-includes/theme.php
+++ b/wp-includes/theme.php
@@ -3804,6 +3804,7 @@ function _wp_keep_alive_customize_changeset_dependent_auto_drafts( $new_status,
  * See {@see 'setup_theme'}.
  *
  * @since 5.5.0
+ * @since 6.1.0 The `block-templates` feature was added.
  */
 function create_initial_theme_features() {
 	register_theme_feature(
@@ -3820,6 +3821,13 @@ function create_initial_theme_features() {
 			'show_in_rest' => true,
 		)
 	);
+	register_theme_feature(
+		'block-templates',
+		array(
+			'description'  => __( 'Whether a theme uses block-based templates.' ),
+			'show_in_rest' => true,
+		)
+	);
 	register_theme_feature(
 		'custom-background',
 		array(
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 495b4a77a2..512490c0fc 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53657';
+$wp_version = '6.1-alpha-53659';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.