diff --git a/Source/Contents/UserData/NormalItemSlots.cpp b/Source/Contents/UserData/NormalItemSlots.cpp
index 19ea9a87..f04326fd 100644
--- a/Source/Contents/UserData/NormalItemSlots.cpp
+++ b/Source/Contents/UserData/NormalItemSlots.cpp
@@ -313,6 +313,12 @@ int NCashWndInfo::IsValid() const {
          this->y <= g_renderer->viewport.height - this->height;
 }
 
+// OFFSET: 0x009A5D00
+// FUNCTION: fn_13656
+int UnusedWndInfoB::IsValid() const {
+  return 0;
+}
+
 // OFFSET: 0x009A5D10
 // FUNCTION: fn_13657
 int SeekPartyWndInfo::IsValid() const {
@@ -367,6 +373,10 @@ int QuickSlotWndInfo::IsValid() const {
          this->y <= g_renderer->viewport.height - this->height;
 }
 
+// OFFSET: 0x009A5F70
+
+// OFFSET: 0x009A5FB0
+
 // OFFSET: 0x009A6110
 // FUNCTION: fn_13668
 int SkillListWndInfo::IsValid() const {
diff --git a/Source/Contents/UserData/NormalItemSlots.h b/Source/Contents/UserData/NormalItemSlots.h
index 8c8b0c14..c226f451 100644
--- a/Source/Contents/UserData/NormalItemSlots.h
+++ b/Source/Contents/UserData/NormalItemSlots.h
@@ -302,6 +302,7 @@ struct UnusedWndInfoB : WindowPlacement {
   /* 0014 */ int unknown_0014;
 
   void Reset();
+  int IsValid() const;
 };
 
 struct SeekPartyWndInfo : WindowPlacement {
@@ -348,10 +349,12 @@ struct QuickSlotWndInfo : WindowPlacement {
 
 struct ReplayRECControlWndInfo : WindowPlacement {
   void Reset();
+  int IsValid() const;
 };
 
 struct SayDialogWndInfo : WindowPlacement {
   void Reset();
+  int IsValid() const;
 };
 
 #if defined(_WIN32) && !defined(_WIN64)