diff -r defc90b7898a -r be1775555bbd src/newgrf_cargo.h
--- a/src/newgrf_cargo.h	Sat Mar 24 14:56:31 2007 +0000
+++ b/src/newgrf_cargo.h	Sat Mar 24 15:19:35 2007 +0000
@@ -21,4 +21,9 @@
 static const CargoID CT_PURCHASE     = NUM_CARGO + 1;
 static const CargoID CT_DEFAULT_NA   = NUM_CARGO + 2;
 
+typedef struct CargoSpec;
+
+SpriteID GetCustomCargoSprite(const CargoSpec *cs);
+uint16 GetCargoCallback(uint16 callback, uint32 param1, uint32 param2, const CargoSpec *cs);
+
 #endif /* NEWGRF_CARGO_H */