--- a/station_cmd.c	Wed Oct 19 08:34:37 2005 +0000
+++ b/station_cmd.c	Wed Oct 19 14:49:46 2005 +0000
@@ -2225,7 +2225,7 @@
 	}
 }
 
-static uint GetSlopeZ_Station(TileInfo *ti)
+static uint GetSlopeZ_Station(const TileInfo* ti)
 {
 	uint z = ti->z;
 	if (ti->tileh != 0)