diff -r c1cddeb8511c -r 383a632de666 src/unmovable_cmd.cpp
--- a/src/unmovable_cmd.cpp	Mon Feb 18 14:59:30 2008 +0000
+++ b/src/unmovable_cmd.cpp	Mon Feb 18 16:11:31 2008 +0000
@@ -348,7 +348,7 @@
 }
 
 
-static uint32 GetTileTrackStatus_Unmovable(TileIndex tile, TransportType mode, uint sub_mode)
+static uint32 GetTileTrackStatus_Unmovable(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
 {
 	return 0;
 }