diff --git a/src/openrct2-ui/scripting/CustomWindow.cpp b/src/openrct2-ui/scripting/CustomWindow.cpp
index 6fd917491b..377f00ad88 100644
--- a/src/openrct2-ui/scripting/CustomWindow.cpp
+++ b/src/openrct2-ui/scripting/CustomWindow.cpp
@@ -414,7 +414,8 @@ namespace OpenRCT2::Ui::Windows
                 {
                     gDropdownItemsFormat[i] = selectedIndex == (int32_t)i ? STR_OPTIONS_DROPDOWN_ITEM_SELECTED
                                                                           : STR_OPTIONS_DROPDOWN_ITEM;
-                    set_format_arg_on((uint8_t*)&gDropdownItemsArgs[i], 0, const char*, items[i].c_str());
+                    auto sz = items[i].c_str();
+                    std::memcpy(&gDropdownItemsArgs[i], &sz, sizeof(const char*));
                 }
                 window_dropdown_show_text_custom_width(
                     w->windowPos.x + widget->left, w->windowPos.y + widget->top, widget->bottom - widget->top + 1,
diff --git a/src/openrct2-ui/windows/TopToolbar.cpp b/src/openrct2-ui/windows/TopToolbar.cpp
index e67a515a7c..72b61eb4dd 100644
--- a/src/openrct2-ui/windows/TopToolbar.cpp
+++ b/src/openrct2-ui/windows/TopToolbar.cpp
@@ -3296,7 +3296,8 @@ static void top_toolbar_init_map_menu(rct_window* w, rct_widget* widget)
         for (const auto& item : customMenuItems)
         {
             gDropdownItemsFormat[i] = STR_STRING;
-            set_format_arg_on((uint8_t*)&gDropdownItemsArgs[i], 0, const char*, item.Text.c_str());
+            auto sz = item.Text.c_str();
+            std::memcpy(&gDropdownItemsArgs[i], &sz, sizeof(const char*));
             i++;
         }
     }