From 75015cdad21aacd711e7bc9dca2150a465570020 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Guilloux?= <glx22@users.noreply.github.com>
Date: Sun, 4 Feb 2024 10:39:06 +0100
Subject: [PATCH] Fix 6f6f099: Signals exist only on plain rail tiles (#11977)

---
 src/rail_gui.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index 636f5e6c2b..7f5586b1e1 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -241,7 +241,7 @@ static void GenericPlaceSignals(TileIndex tile)
 		Command<CMD_REMOVE_SINGLE_SIGNAL>::Post(STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM, CcPlaySound_CONSTRUCTION_RAIL, tile, track);
 	} else {
 		/* Which signals should we cycle through? */
-		bool tile_has_signal = IsValidTrack(track) && HasSignalOnTrack(tile, track);
+		bool tile_has_signal = IsPlainRailTile(tile) && IsValidTrack(track) && HasSignalOnTrack(tile, track);
 		SignalType cur_signal_on_tile = tile_has_signal ? GetSignalType(tile, track) : _cur_signal_type;
 		SignalType cycle_start;
 		SignalType cycle_end;