diff --git a/wp-includes/comment-template.php b/wp-includes/comment-template.php
index d125f0c2dd..8c56097333 100644
--- a/wp-includes/comment-template.php
+++ b/wp-includes/comment-template.php
@@ -24,7 +24,7 @@
 function get_comment_author( $comment_id = 0 ) {
 	$comment = get_comment( $comment_id );
 
-	$comment_id = ! empty( $comment->comment_ID ) ? $comment->comment_ID : $comment_id;
+	$comment_id = ! empty( $comment->comment_ID ) ? $comment->comment_ID : (string) $comment_id;
 
 	if ( empty( $comment->comment_author ) ) {
 		$user = ! empty( $comment->user_id ) ? get_userdata( $comment->user_id ) : false;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ace5ed3e94..477c43aeaf 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-58334';
+$wp_version = '6.6-alpha-58335';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.