diff --git a/CM2005 Object Oriented Programming/Topic 5/5.1.5/MerkelMain.h b/CM2005 Object Oriented Programming/Topic 5/5.1.5/MerkelMain.h
index 5d750b1..b0e9ada 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.1.5/MerkelMain.h	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.1.5/MerkelMain.h	
@@ -3,6 +3,7 @@
 #include <vector>
 #include "OrderBookEntry.h"
 #include "OrderBook.h"
+#include "Wallet.h"
 
 class MerkelMain
 {
@@ -25,4 +26,5 @@ class MerkelMain
 
         OrderBook orderBook{"20200317.csv"};
 
+        Wallet wallet;
 };