diff --git a/wp-includes/template-functions-comment.php b/wp-includes/template-functions-comment.php
index 5f9e84ddc..739bb3f17 100644
--- a/wp-includes/template-functions-comment.php
+++ b/wp-includes/template-functions-comment.php
@@ -106,7 +106,7 @@ function comment_author_link() {
     }
 
     $url = str_replace('http://url', '', $url);
-    $url = preg_replace('|[^a-z0-9-_.?#=&;,/:]|i', '', $url);
+    $url = preg_replace('|[^a-z0-9-~+_.?#=&;,/:]|i', '', $url);
     if (empty($url) && empty($email)) {
         echo $author;
         return;