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-rw-r--r--src/road_internal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/road_internal.h b/src/road_internal.h
index 0e0218a10..7a56a4824 100644
--- a/src/road_internal.h
+++ b/src/road_internal.h
@@ -31,6 +31,6 @@ bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, bool *ed
* @param ti information about the tile (position, slope)
* @param tram the roadbits to draw the catenary for
*/
-void DrawTramCatenary(TileInfo *ti, RoadBits tram);
+void DrawTramCatenary(const TileInfo *ti, RoadBits tram);
#endif /* ROAD_INTERNAL_H */