--- a/gui.h	Sun Oct 16 07:58:15 2005 +0000
+++ b/gui.h	Sun Oct 16 09:13:04 2005 +0000
@@ -35,7 +35,7 @@
 void ShowMessageHistory(void);
 
 /* traintoolb_gui.c */
-void ShowBuildRailToolbar(int index, int button);
+void ShowBuildRailToolbar(RailType railtype, int button);
 void PlaceProc_BuyLand(TileIndex tile);
 
 /* train_gui.c */