diff --git a/Source/UI/UILapineUpgradeBoxWnd.cpp b/Source/UI/UILapineUpgradeBoxWnd.cpp
index 5b5fc8b12..d88cbae82 100644
--- a/Source/UI/UILapineUpgradeBoxWnd.cpp
+++ b/Source/UI/UILapineUpgradeBoxWnd.cpp
@@ -37,6 +37,13 @@ namespace {
   static_assert(sizeof(LapineUpgradeClosePacket) == 2);
 }
 
+// OFFSET: 0x00602D30
+// FUNCTION: fn_04187
+UILapineUpgradeBoxWnd::UILapineUpgradeBoxWnd(UIWindowContext& windows, UIFrameContext& frames, UIButtonContext& controls)
+    : UIFrameWnd(windows, frames, 0), closeButton(nullptr), upgradeButton(nullptr), selectButton(nullptr), ingredientList(nullptr), ingredientId(0),
+      noticeTick(0), noticeDuration(3000), waiting(0), m_controls(&controls) {
+}
+
 // INLINED
 UILapineUpgradeBoxWnd::~UILapineUpgradeBoxWnd() {
   this->item = ITEM_INFO();
diff --git a/Source/UI/UILapineUpgradeBoxWnd.h b/Source/UI/UILapineUpgradeBoxWnd.h
index 07e84a983..41170ed0e 100644
--- a/Source/UI/UILapineUpgradeBoxWnd.h
+++ b/Source/UI/UILapineUpgradeBoxWnd.h
@@ -41,6 +41,7 @@ class UILapineUpgradeBoxWnd : public UIFrameWnd {
   friend class UILapineUpgradeBox_IngredientListWnd;
 
 public:
+  UILapineUpgradeBoxWnd(UIWindowContext& windows, UIFrameContext& frames, UIButtonContext& controls);
   ~UILapineUpgradeBoxWnd() override;
   void Slot10(int x, int y, std::intptr_t value) override;
   void Slot15(int width, int height) override;