diff --git a/classes/ShopItem.php b/classes/ShopItem.php
index 277d21e..048b794 100644
--- a/classes/ShopItem.php
+++ b/classes/ShopItem.php
@@ -4,7 +4,7 @@ class ShopItem extends Item
 {
     public function printInfo()
     {
-        if (self::printControls(true)) $this->maxdur = 0;
+        if ($this->printControls()) $this->maxdur = 0;
 
         parent::printBaseInfo();
         parent::printRequirements();