diff --git a/app/portal/taglib/Portal.php b/app/portal/taglib/Portal.php
index 985a3c8cfd10c1e0b9e189fffdcb84868d78832f..d1a13b6abae2dae7066cf9f89d77e9344dd9db8a 100644
--- a/app/portal/taglib/Portal.php
+++ b/app/portal/taglib/Portal.php
@@ -83,7 +83,7 @@ class Portal extends TagLib
             }
         }
 
-        if (strpos($tag['order'], '$') === 0) {
+        if (!empty($tag['order']) && strpos($tag['order'], '$') === 0) {
             $order = $tag['order'];
             $this->autoBuildVar($order);
         } else {