diff --git a/Source/Contents/UserData/NormalItemSlots.cpp b/Source/Contents/UserData/NormalItemSlots.cpp
index 1f47a308..441c90d7 100644
--- a/Source/Contents/UserData/NormalItemSlots.cpp
+++ b/Source/Contents/UserData/NormalItemSlots.cpp
@@ -25,13 +25,13 @@ void NormalItemSlotWindow::Reset() {
 
 // OFFSET: 0x009A6000
 // FUNCTION: fn_13667
-bool NormalItemSlotWindow::IsValid(int screenWidth, int screenHeight, bool active) const {
-  if (this->width != 290 || this->height < 43 || this->height > 175 || (this->height - 10) % 33 != 0 || (this->height == 175 && !active)) {
-    return false;
+int NormalItemSlotWindow::IsValid() const {
+  if (this->width != 290 || this->height > 175 || this->height < 43 || (this->height - 10) % 33 != 0 || (this->height == 175 && !g_session.ItemSlotActive())) {
+    return 0;
   }
 
-  const int maxX = screenWidth - 290;
-  const int maxY = screenHeight - this->height;
+  const int maxX = g_renderer->viewport.width - 290;
+  const int maxY = g_renderer->viewport.height - this->height;
   return this->x >= 0 && this->x <= maxX && this->y >= 0 && this->y <= maxY;
 }
 
diff --git a/Source/Contents/UserData/NormalItemSlots.h b/Source/Contents/UserData/NormalItemSlots.h
index e303d72a..dad8817c 100644
--- a/Source/Contents/UserData/NormalItemSlots.h
+++ b/Source/Contents/UserData/NormalItemSlots.h
@@ -26,7 +26,7 @@ struct NormalItemSlotWindow {
   /* 000C */ int height;
   /* 0010 */ int show;
   void Reset();
-  bool IsValid(int screenWidth, int screenHeight, bool active) const;
+  int IsValid() const;
 };
 
 #if defined(_WIN32) && !defined(_WIN64)
diff --git a/Source/UI/Shortcuts/UIShortCutWnd.cpp b/Source/UI/Shortcuts/UIShortCutWnd.cpp
index fe1f50e0..6712d29e 100644
--- a/Source/UI/Shortcuts/UIShortCutWnd.cpp
+++ b/Source/UI/Shortcuts/UIShortCutWnd.cpp
@@ -263,7 +263,7 @@ inline void UIShortCutWnd::ResizeRows() {
 // INLINED
 inline void UIShortCutWnd::RestoreLayout(NormalItemSlotWindow* value) {
   this->m_saved = value;
-  if (!value->IsValid(g_windowMgr.unknown_047C, g_windowMgr.unknown_0480, g_session.ItemSlotActive())) {
+  if (!value->IsValid()) {
     value->Reset();
   }