diff --git a/src/industry_cmd.cpp b/src/industry_cmd.cpp
--- a/src/industry_cmd.cpp
+++ b/src/industry_cmd.cpp
@@ -385,7 +385,7 @@ static void DrawTile_Industry(TileInfo *
 	}
 }
 
-static int GetSlopePixelZ_Industry(TileIndex tile, uint x, uint y)
+static int GetSlopePixelZ_Industry(TileIndex tile, uint x, uint y, bool ground_vehicle)
 {
 	return GetTileMaxPixelZ(tile);
 }