diff --git a/Source/UI/Item/UIMerchantItemLogWnd.cpp b/Source/UI/Item/UIMerchantItemLogWnd.cpp
index b60786ea..38ddacb9 100644
--- a/Source/UI/Item/UIMerchantItemLogWnd.cpp
+++ b/Source/UI/Item/UIMerchantItemLogWnd.cpp
@@ -17,6 +17,12 @@
 #include "UI/Window/WindowManagerWindows.h"
 #include "Utility/Text/FormatString.h"
 
+// OFFSET: 0x0099E0E0
+// FUNCTION: fn_13571
+UIMerchantItemLogWnd::UIMerchantItemLogWnd(UIWindowContext& windows, UIFrameContext& frames, int mode) : UIItemBaseWnd(windows, frames) {
+  this->unknown_00FC = mode;
+}
+
 // OFFSET: 0x0099E510
 // FUNCTION: fn_13575
 void UIMerchantItemLogWnd::Slot15(int width, int height) {
diff --git a/Source/UI/Item/UIMerchantItemLogWnd.h b/Source/UI/Item/UIMerchantItemLogWnd.h
index 0c429f01..3d08df35 100644
--- a/Source/UI/Item/UIMerchantItemLogWnd.h
+++ b/Source/UI/Item/UIMerchantItemLogWnd.h
@@ -23,6 +23,7 @@ public:
     /* 0038 */ std::uint32_t characterId;
   };
 
+  UIMerchantItemLogWnd(UIWindowContext& windows, UIFrameContext& frames, int mode);
   void Slot15(int width, int height) override;
   void Slot19() override;
   void Slot28(int x, int y) override;