diff --git a/source/frontend/StarMerchantInterface.hpp b/source/frontend/StarMerchantInterface.hpp
index b717a61..967a2ce 100644
--- a/source/frontend/StarMerchantInterface.hpp
+++ b/source/frontend/StarMerchantInterface.hpp
@@ -76,6 +76,7 @@ private:
   ItemBagPtr m_itemBag;
 
   int m_buyCount;
+  int m_maxBuyCount;
 };
 
 }