diff --git a/src/wp-includes/locale.php b/src/wp-includes/locale.php
index 7541b8471b..1319c49dae 100644
--- a/src/wp-includes/locale.php
+++ b/src/wp-includes/locale.php
@@ -195,7 +195,8 @@ class WP_Locale {
 	 * @since 3.8.0
 	 */
 	public function rtl_src_admin_notice() {
-		echo '<div class="error"><p>' . 'The <code>build</code> directory of the develop repository must be used for RTL.' . '</p></div>';
+		/* translators: %s: Name of the directory (build) */
+		echo '<div class="error"><p>' . sprintf( __( 'The %s directory of the develop repository must be used for RTL.' ), '<code>build</code>' ) . '</p></div>';
 	}
 
 	/**