diff --git a/wp-includes/template-functions.php b/wp-includes/template-functions.php
index c314d156d0..73655faa4d 100644
--- a/wp-includes/template-functions.php
+++ b/wp-includes/template-functions.php
@@ -1659,7 +1659,7 @@ 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;