diff --git a/src/cargo_type.h b/src/cargo_type.h
--- a/src/cargo_type.h
+++ b/src/cargo_type.h
@@ -61,6 +61,7 @@ enum CargoType {
 	CT_PLASTIC      = 10,
 	CT_FIZZY_DRINKS = 11,
 
+	NUM_ORIGINAL_CARGO = 12,
 	NUM_CARGO       = 64,   ///< Maximal number of cargo types in a game.
 
 	CT_AUTO_REFIT   = 0xFD, ///< Automatically choose cargo type when doing auto refitting.