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-rw-r--r--tunnelbridge_cmd.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/tunnelbridge_cmd.c b/tunnelbridge_cmd.c
index 9806d59be..0034f10f7 100644
--- a/tunnelbridge_cmd.c
+++ b/tunnelbridge_cmd.c
@@ -820,8 +820,12 @@ int32 DoConvertTunnelBridgeRail(TileIndex tile, uint totype, bool exec)
if (GB(_m[tile].m3, 0, 4) == totype) return CMD_ERROR;
- SB(_m[tile].m3, 0, 4, totype);
- SB(_m[endtile].m3, 0, 4, totype);
+ if (exec) {
+ SB(_m[tile].m3, 0, 4, totype);
+ SB(_m[endtile].m3, 0, 4, totype);
+ MarkTileDirtyByTile(tile);
+ MarkTileDirtyByTile(endtile);
+ }
cost = 2 * (_price.build_rail >> 1);
delta = TileOffsByDir(GetBridgeRampDirection(tile));
for (tile += delta; tile != endtile; tile += delta) {