diff --git a/op/op.Settings.php b/op/op.Settings.php
index e549fd26a..238a8a807 100644
--- a/op/op.Settings.php
+++ b/op/op.Settings.php
@@ -183,7 +183,7 @@ if ($action == "saveSettings")
 
   // SETTINGS - ADVANCED - INDEX CMD
 	$settings->_converters['fulltext'] = $_POST["converters"];
-	$newmimetype = preg_replace('#[^A-Za-z0-9_/+.-]+#', '', $_POST["converters_newmimetype"]);
+	$newmimetype = preg_replace('#[^A-Za-z0-9_/+.-*]+#', '', $_POST["converters_newmimetype"]);
   if($newmimetype && trim($_POST["converters_newcmd"])) {
     $settings->_converters['fulltext'][$newmimetype] = trim($_POST["converters_newcmd"]);
   }