--- a/src/tree_cmd.cpp	Thu May 24 21:59:12 2007 +0000
+++ b/src/tree_cmd.cpp	Thu May 24 22:41:50 2007 +0000
@@ -648,7 +648,7 @@
 	/* not used */
 }
 
-static uint32 GetTileTrackStatus_Trees(TileIndex tile, TransportType mode)
+static uint32 GetTileTrackStatus_Trees(TileIndex tile, TransportType mode, uint sub_mode)
 {
 	return 0;
 }