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-rw-r--r--src/tunnel_map.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/tunnel_map.h b/src/tunnel_map.h
index 66d5bcd10..8396ae2c9 100644
--- a/src/tunnel_map.h
+++ b/src/tunnel_map.h
@@ -87,6 +87,7 @@ static inline void SetTunnelSnowOrDesert(TileIndex t, bool snow_or_desert)
TileIndex GetOtherTunnelEnd(TileIndex);
bool IsTunnelInWay(TileIndex, uint z);
+bool IsTunnelInWayDir(TileIndex tile, uint z, DiagDirection dir);
/**