Ticket #21579: 21579.patch

wp-includes/link-template.php

@@ -2338 +2338 @@
                 return;
 
         $link = get_permalink( $id );
+
+        if ( $page = get_query_var('cpage') )
+                $link = get_comments_pagenum_link( $page );
+
         echo "<link rel='canonical' href='$link' />\n";
 }