diff --git a/wp-includes/comment-template.php b/wp-includes/comment-template.php
index 26e2818b1d..78635778f2 100644
--- a/wp-includes/comment-template.php
+++ b/wp-includes/comment-template.php
@@ -1437,7 +1437,7 @@ function get_comment_reply_link( $args = array(), $comment = null, $post = null
 			$args['add_below'], $comment->comment_ID, $args['respond_id'], $post->ID
 		);
 
-		$link = sprintf( "<a class='comment-reply-link' href='%s' onclick='%s' aria-label='%s'>%s</a>",
+		$link = sprintf( "<a rel='nofollow' class='comment-reply-link' href='%s' onclick='%s' aria-label='%s'>%s</a>",
 			esc_url( add_query_arg( 'replytocom', $comment->comment_ID, get_permalink( $post->ID ) ) ) . "#" . $args['respond_id'],
 			$onclick,
 			esc_attr( sprintf( $args['reply_to_text'], $comment->comment_author ) ),
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 57c7f439c7..7f042d7c80 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-beta1-33046';
+$wp_version = '4.3-beta1-33047';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.