diff --git a/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp b/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp
index 4f323192..61434a95 100644
--- a/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp
+++ b/Source/UI/Acceptance/UIChooseSellBuyWnd.cpp
@@ -3199,6 +3199,16 @@ void UInCashWnd::Slot35(int delta) {
 }
 
 // OFFSET: 0x008D7660
+// FUNCTION: fn_12121
+int UISayDialogWnd::ButtonX(UIBitmapButton* button) {
+  int x = this->geometry.width - 4;
+  for (UIWindow* other : this->m_buttons) {
+    if (button != other) {
+      x += -4 - static_cast<UIBitmapButton*>(other)->BitmapWidth();
+    }
+  }
+  return x - button->BitmapWidth();
+}
 
 // OFFSET: 0x008FFBE0
 // FUNCTION: fn_12363
diff --git a/Source/UI/Dialogs/UISayDialogWnd.h b/Source/UI/Dialogs/UISayDialogWnd.h
index 7ffd6525..4a672e63 100644
--- a/Source/UI/Dialogs/UISayDialogWnd.h
+++ b/Source/UI/Dialogs/UISayDialogWnd.h
@@ -23,6 +23,7 @@ public:
   void Slot11() override;
   void Slot19() override;
   void Paint() override;
+  int ButtonX(UIBitmapButton* button);
 };
 
 #endif