From fd3346b4b3a35f09bcca4eb485ee0a1e91889ddc Mon Sep 17 00:00:00 2001
From: Hielke Morsink <hielke.morsink@gmail.com>
Date: Mon, 15 May 2023 20:57:17 +0200
Subject: [PATCH] Fix: items after the removed RCT1 theme have wrong index

---
 src/openrct2-ui/windows/Options.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/openrct2-ui/windows/Options.cpp b/src/openrct2-ui/windows/Options.cpp
index 172f485e31..b1d019bb0b 100644
--- a/src/openrct2-ui/windows/Options.cpp
+++ b/src/openrct2-ui/windows/Options.cpp
@@ -1397,6 +1397,14 @@ private:
                 break;
             case WIDX_TITLE_MUSIC_DROPDOWN:
             {
+                // HACK: When RCT1 is not available, it's not in the dropdown, so indices higher than it should be incremented
+                const bool rct1MusicThemeIsAvailable = IsRCT1TitleMusicAvailable();
+                for (size_t i = 0; i < std::size(TitleThemeOptions) && static_cast<int32_t>(i) <= dropdownIndex; i++)
+                {
+                    if (TitleThemeOptions[i].Kind == TitleMusicKind::RCT1 && !rct1MusicThemeIsAvailable)
+                        dropdownIndex++;
+                }
+
                 gConfigSound.TitleMusic = TitleThemeOptions[dropdownIndex].Kind;
                 ConfigSaveDefault();
                 Invalidate();