diff --git a/phpgwapi/inc/common_functions.inc.php b/phpgwapi/inc/common_functions.inc.php
index 0c8b080a8f..1c000e0a95 100755
--- a/phpgwapi/inc/common_functions.inc.php
+++ b/phpgwapi/inc/common_functions.inc.php
@@ -1189,7 +1189,7 @@
 	{
 		$pregs = array(
 			'order' => '/^[a-zA-Z0-9_]*$/',
-			'sort'  => '/^(ASC|DESC|asc|desc){0,1}$/',
+			'sort'  => '/^(ASC|DESC|asc|desc|0|1|2|3|4|5|6|7){0,1}$/',
 		);
 		foreach(array('order','sort') as $name)
 		{