diff --git a/phpgwapi/inc/class.config.inc.php b/phpgwapi/inc/class.config.inc.php
index 5b5c648403..5a50c701f3 100755
--- a/phpgwapi/inc/class.config.inc.php
+++ b/phpgwapi/inc/class.config.inc.php
@@ -304,7 +304,7 @@ class config
 	protected static function unserialize($str)
 	{
 		// handling of new json-encoded arrays
-		if ($str[0] == '{' && $str[0] != '[')
+		if ($str[0] == '{' || $str[0] == '[')
 		{
 			return json_decode($str, true);
 		}