--- a/vehicle.h	Wed Mar 08 23:21:32 2006 +0000
+++ b/vehicle.h	Thu Mar 09 12:32:25 2006 +0000
@@ -284,7 +284,7 @@
 Vehicle *FindVehicleBetween(TileIndex from, TileIndex to, byte z);
 TileIndex GetVehicleOutOfTunnelTile(const Vehicle *v);
 
-bool UpdateSignalsOnSegment(TileIndex tile, Direction direction);
+bool UpdateSignalsOnSegment(TileIndex tile, DiagDirection direction);
 void SetSignalsOnBothDir(TileIndex tile, byte track);
 
 Vehicle *CheckClickOnVehicle(const ViewPort *vp, int x, int y);