diff --git a/webapp/controller/BaseController.class.php b/webapp/controller/BaseController.class.php
index 6c6f542b..d0e2f035 100644
--- a/webapp/controller/BaseController.class.php
+++ b/webapp/controller/BaseController.class.php
@@ -54,7 +54,7 @@ class BaseController {
     public function _getZid()
     {
         $net = getReqVal('_net', '');
-        $zid = $net && count($net) > 3 ? $net[2] : 3;
+        $zid = $net && strlen($net) > 3 ? $net[2] : 3;
         return ($zid >= 1 && $zid <= 4) ? $zid : 3;
     }