--- a/src/newgrf_industrytiles.h	Mon Jul 09 19:38:12 2007 +0000
+++ b/src/newgrf_industrytiles.h	Mon Jul 09 20:08:25 2007 +0000
@@ -7,6 +7,6 @@
 
 bool DrawNewIndustryTile(TileInfo *ti, Industry *i, IndustryGfx gfx, const IndustryTileSpec *inds);
 uint16 GetIndustryTileCallback(uint16 callback, uint32 param1, uint32 param2, IndustryGfx gfx_id, Industry *industry, TileIndex tile);
-bool PerformIndustryTileSlopeCheck(TileIndex tile, const IndustryTileSpec *its, IndustryGfx gfx);
+bool PerformIndustryTileSlopeCheck(TileIndex tile, const IndustryTileSpec *its, IndustryType type, IndustryGfx gfx);
 
 #endif /* NEWGRF_INDUSTRYTILES_H */