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-rw-r--r--src/newgrf_object.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/newgrf_object.h b/src/newgrf_object.h
index cf8b6a9de..09d3df2ef 100644
--- a/src/newgrf_object.h
+++ b/src/newgrf_object.h
@@ -111,4 +111,7 @@ struct ObjectSpec {
/** Struct containing information relating to station classes. */
typedef NewGRFClass<ObjectSpec, ObjectClassID, OBJECT_CLASS_MAX> ObjectClass;
+/** Mapping of purchase for objects. */
+static const CargoID CT_PURCHASE_OBJECT = 1;
+
#endif /* NEWGRF_OBJECT_H */