diff --git a/wp-includes/feed-atom-comments.php b/wp-includes/feed-atom-comments.php
index e11955f746..37f663a337 100644
--- a/wp-includes/feed-atom-comments.php
+++ b/wp-includes/feed-atom-comments.php
@@ -111,7 +111,7 @@ while ( have_comments() ) :
 
 		<?php
 		// Return comment threading information (https://www.ietf.org/rfc/rfc4685.txt).
-		if ( 0 == $comment->comment_parent ) : // This comment is top-level.
+		if ( '0' === $comment->comment_parent ) : // This comment is top-level.
 			?>
 			<thr:in-reply-to ref="<?php the_guid(); ?>" href="<?php the_permalink_rss(); ?>" type="<?php bloginfo_rss( 'html_type' ); ?>" />
 			<?php
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5092156624..d020dec536 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56323';
+$wp_version = '6.4-alpha-56324';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.