diff --git a/save_list.php b/save_list.php
index cdd2d9d..61d10e3 100644
--- a/save_list.php
+++ b/save_list.php
@@ -35,7 +35,7 @@ $domain = $_SESSION["domain"];
 
 // We do not print any error in the next four cases, because a legitimate
 // user will never produce such results, even with disables javascript
-if ( preg_match("/[^a-z0-9_]/", $list_name) )
+if ( preg_match("/[^a-z0-9_-]/", $list_name) )
 {
     header("Location: error.php");
     exit();